Results

CentrePiece article

Working from home in the public sector

Study finds workers work faster when they work from home...Read more...

CentrePiece article

Finding meaning at work

Helping employees assess their jobs through the lens of purpose increases productivity and narrows gender gaps in career choices...Read more...

CEP discussion paper

The broken ladder: AI, remote work, and early-career hiring

Is generative AI replacing junior workers? A growing literature answers yes, citing large declines in early-career hiring concentrated in GenAI-exposed occupations. We argue that this verdict is premature because GenAI e...Read more...

Chapter

Advancing gender equality in parenting: the remaining challenge

in The Routledge International Handbook of Time Use Themes and Applications

The roles of men and women in the labour market have been converging in recent decades, but studies have shown that women are devoting more time to childcare, widening the gender gap in this area. Using data from the UK ...Read more...

Blog

Transform work:

Transform work with Raffaella Sadun, Professor of Business Administration at Harvard Business School (podcast)

Raffaella's work sits at the intersection of economics, leadership, and the future of work. Drawing on large-scale data and real-world field experiments inside major companies, she explores how hybrid work is reshaping l...Read more...

CEP discussion paper

Minimum wages and the nature of work

When minimum wage increases impose a cost shock on employers of low wage workers, there are a variety of ways in which firms can adjust. Rather than study the main focal point of much minimum wage research, possible labo...Read more...

Blog

Vox EU:

Remote work can blunt the fertility decline

Fertility has fallen to very low levels in many advanced economies, and many pro-natalist policies appear to deliver only modest gains at a high cost. Using survey data from 38 countries, this article shows that both pla...Read more...

Blog

LSE Business Review:

Helping employees find 'meaning' improves performance and narrows gender gaps

A common way to boost employee motivation is to provide monetary incentives linked to a firm's goals. Oriana Bandiera finds that a different approach to motivation, which encourages employees to reassess their roles thro...Read more...

CEP discussion paper

Accommodating emerging giants in the global economy

How has aggregate income and welfare in the United States been affected by globalization and rapid productivity growth in emerging economies? We use the class of constant elasticity trade models to provide quantitative e...Read more...

Journal article

Journal of International Economics:

Paper tiger? Chinese science and home bias in citations

We investigate the phenomenon of home bias in scientific citations, where researchers disproportionately cite work from their own country. We develop a benchmark for expected citations based on the relative size of count...Read more...

Journal article

American Economic Journal: Economic Policy:

The making of civic virtues: a school-based experiment in three countries

This paper shows that schools can foster the transmission of civic virtues by helping students to develop concrete, democratically chosen, collective projects. We draw on a RCT implemented in 200 middle schools in three ...Read more...

Blog

Vox EU:

Fully remote work expands recruitment and boosts productivity

The Covid-19 pandemic sparked a large and lasting shift to remote work. This column draws on detailed administrative data from a major call centre in Turkiye to show that a permanent shift to fully remote work can expand...Read more...

Blog

Vox EU:

Working from home boosted growth by expanding disability employment

Individuals with a disability have remarkably low employment rates compared to the rest of the population. This column examines whether the rapid rise in the ability to work from home post-pandemic has improved disabilit...Read more...

Journal article

Psychological Medicine :

Cost-benefit of IAPT Norway and effects on work-related outcomes and health care utilization: results from a randomized controlled trial using registry-based data

Data from an RCT of IAPT Norway (?Prompt Mental Health Care? [PMHC]) were linked to several administrative registers up to five years following the intervention. The aims were to (1) examine the effects of PMHC compared ...Read more...

CEP discussion paper

Paper tiger? Chinese science and home bias in citations

We investigate the phenomenon of home bias in scientific citations, where researchers disproportionately cite work from their own country. We develop a benchmark for expected citations based on the relative size of count...Read more...

Journal article

PNAS:

How working from home reshapes cities

In recent decades, economic activity has become increasingly concentrated in major global metropolises. Yet, the rise of working from home threatens this dominance of cities. Using multiple high-frequency datasets on spe...Read more...

CEP occasional paper

Has work from home shifted the US electoral map?

Since 2020, the dramatic rise in remote work has coincided with increased geographic mobility in the United States. We examine the relationship between these trends and their effects on the electoral landscape. Using IRS...Read more...

Blog

LSE Politics and Policy:

Why higher house prices lead to higher borrowing

In the past three decades, house prices and mortgage debt in the UK have risen much faster than income. In other words, people end up borrowing more money when house prices go up. This finding goes against many canonical...Read more...

CEP discussion paper

Not incentivized yet efficient: working from home in the public sector

This paper studies whether working from home (WFH) affects workers' performance in public sector jobs. Studying public sector initiatives allows us to establish baseline estimates on the impact of WFH net of incentives. ...Read more...

CEP discussion paper

Online versus in-person services: effects on patients and providers

Online delivery of one-to-one services offers potential cost savings and increased convenience, yet relatively little is known about its impacts on providers and consumers. This paper studies the online delivery of healt...Read more...

CEP discussion paper

Firm heterogeneity and imperfect competition in global production networks

How do production networks and market structure interact to shape the effects of trade and competition policy? We develop a model with two-sided firm heterogeneity, matching frictions, and imperfect supplier competition....Read more...

CEP discussion paper

The wage of temporary agency workers

Using French administrative data, we estimate the wage gap distribution between in-house and temporary agency workers working in the same establishment and the same occupation. The average wage gap is about 3%, but the g...Read more...

CEP discussion paper

Gendered change: 150 years of transformation in US hours

Women's contribution to the economy has been markedly underestimated in predominantly agricultural societies, due to their widespread involvement in unpaid agricultural work. Combining data from the US Census and several...Read more...

Blog

Vox EU:

Managers say working from home is here to stay

Krishan Shah, Nicholas Bloom, Philip Bunn, Paul Mizen, Gregory Thwaites, and Ivan Yotzov analyse new firm-level data to explore future remote work trends. Managers expect 2028 remote work levels to mirror those of 2023, ...Read more...

Journal article

Journal of Population Economics:

Teleworking and life satisfaction during Covid-19: the importance of family structure

We carry out a difference-in-differences analysis of a real-time survey conducted as part of the German Socio-Economic Panel (SOEP) survey and show that teleworking had a negative average effect on life satisfaction over...Read more...

Journal article

Research in Labor Economics:

Effort at work and worker well-being

This chapter analyzes detailed 24-hour diary data from the United States to provide evidence on the relationship between workers? effort and well-being while at work. In doing so, we first measure workers? effort in term...Read more...

Blog

Hoover Institution:

Work from Home and Productivity - A Conversation with Nick Bloom (Podcast)

Steven Davis and Nick Bloom discuss the big shift to work from home, what it means for productivity, why perceptions in this regard often differ between managers and workers, and why - on balance - the big shift is a ble...Read more...

Journal article

Annual Review of Economics:

Labor market insurance policies in the Twenty-First Century

The COVID-19 crisis was a stress test for unemployment insurance schemes as it involved a sudden and unexpected shutdown of a very large set of activities. This forced countries to introduce, often from scratch, income s...Read more...

Blog

LSE Business Review:

Should we call time on presenteeism?

Many companies have adopted a "remote first" approach for their workforce, but a growing number of firms are now demanding that employees work from the office most of the time. Jasmine Virhia and Grace Lordan warn firms ...Read more...

Blog

Financial Times:

Are Fridays dead? (podcast)

It's Friday afternoon in the city. There are office blocks all around and a restaurant or bar on every corner... so where is everyone? If occupancy and travel data are anything to go by, they're probably at home. Nick Bl...Read more...

Journal article

Information Technology & People:

Well-being and working from home during Covid-19

The authors track the well-being of individuals across five European countries during the course of the coronavirus disease 2019 (COVID-19) pandemic and relate their well-being to working from home. The authors also cons...Read more...

Journal article

Economie et Statistique / Economics and Statistics:

The role of telework for productivity during and post Covid-19

Motivated by the sudden adoption of telework in the wake of the COVID-19 pandemic, the OECD Global Forum on Productivity (GFP) undertook an online survey among managers and workers in 25 countries about their experience ...Read more...

CEP discussion paper

How hybrid working from home works out

Hybrid working from home (WFH), whereby employees work a mix of days at home and at work each week, has become dominant for graduate employees in the US. This paper evaluates a randomized control trial on 1612 engineers,...Read more...

CEP discussion paper

Working from home around the world

The pandemic triggered a large, lasting shift to work from home (WFH). To study this shift, we survey full-time workers who finished primary school in 27 countries as of mid-2021 and early 2022. Our cross-country compari...Read more...

CEP discussion paper

Long social distancing

Many working-age Americans say they will continue some forms of social distancing after the COVID-19 pandemic ends. We uncover this long social distancing phenomenon in our monthly Survey of Working Arrangements and Atti...Read more...

Blog

Vox EU:

Commute time savings when working from home

The large shift to work from home during the Covid-19 pandemic reduced the amount of time that workers spend commuting. This column reports on a global survey of workers in 27 countries showing that working from home sav...Read more...

Blog

LSE Business Review:

UTOPIA and the City: the future of work in financial and professional services

In the midst of a reorganisation of work caused by the pandemic, there is no one-size-fits-all arrangement and employers are battling to find the right mix between office and home working. To learn more about how to get ...Read more...

Journal article

Brookings Papers on Economic Activity:

Working from home around the world

The pandemic triggered a large, lasting shift to work from home (WFH). To study this shift, we survey full-time workers who finished primary school in twenty-seven countries as of mid-2021 and early 2022. Our cross-count...Read more...

CEP discussion paper

Labor market insurance policies in the XXI century

The recovery from the Covid-19 crisis will force governments to accelerate transformation in their menu of labor market policy tools. The crisis was a stress test for unemployment insurance schemes as it involved a sudde...Read more...

Journal article

Journal of Human Resources :

Workplace presenteeism, job substitutability and gender inequality

This paper explores how the parenthood wage penalty is partially explained by an increased within-couple gap in job uniqueness (i.e., the within-establishment substitutability of workers). Uniqueness is rewarded with hig...Read more...

Journal article

Journal of Operations Management:

Working from home and firm resilience to the Covid-19 pandemic

The COVID-19 pandemic has disrupted firms' operations. To cope with the crisis, many firms have allowed their employees to work from home (WFH). We examine whether a firm's WFH capacity has increased its resilience durin...Read more...

Blog

The Sutton Trust:

Gloomy prospects for social mobility in the pandemic era

Lee Elliot Major and Andrew Eyles explain how a gap in missed education between richer and poorer children was exacerbated by stark home learning divides and the likely consequences for social mobility....Read more...

External report

Social mobility: past, present and future

Andrew Eyles, Lee Elliot Major and Stephen Machin forecast that relative income mobility levels in the UK could fall by as much as 12%, driven by learning loss in schools....Read more...

Journal article

Mothers in the Labor Market:

Temporal flexibility, breaks at work, and the motherhood wage gap

We analyze the relationship between temporal flexibility at work (i.e., the ability to vary or change the time of beginning or ending work) and the motherhood wage gap of working parents, in the US. To that end, we first...Read more...

CEP discussion paper

How does working from home during Covid-19 affect what managers do? Evidence from time-use studies

We assess how the sudden and widespread shift to working from home during the pandemic impacted how managers allocate time throughout their working day. We analyze the results from an online time-use survey with data on ...Read more...

Journal article

Journal of International Economics:

Technology, market structure and the gains from trade

We study the gains from trade in a model with oligopolistic competition, heterogeneous firms and innovation. Our key finding is that a trade-induced increase in market concentration can be an important source of the gain...Read more...

Blog

VoxEU:

Teleworking is here to stay and may raise productivity if implemented appropriately

The pandemic triggered a surge in teleworking, raising questions about its persistence as well as its impact on firm performance and worker wellbeing. This column argues that teleworking is here to stay - for most worker...Read more...

Blog

LSE Business Review:

Economists discuss the impact of working from home on productivity, job satisfaction, and women's career progression

The pandemic has led to a big shift to working from home among people in occupations where it is possible for the jobs or some part of them to be done remotely. There has been much debate about the extent to which such f...Read more...

Blog

VoxEU:

Working from home and corporate real estate

As remote working became more common during Covid-19, Antonin Bergeaud, Jean Benoit Eymeoud, Thomas Garcia and Dorian Henricot examine how corporate real-estate market participants adjusted to the growth of teleworking i...Read more...

Blog

VoxEU:

'Potential capital', working from home, and economic resilience

Janice Eberly, Jonathan Haskel and Paul Mizen estimate the potential capital and labour saved through working from home that would otherwise have been lost during the Covid-19 pandemic....Read more...

Blog

VoxEU:

Comparing online to in-person meetings

Covid-19 resulted in a shift towards working from home. This column discusses the findings of a survey of over 2,000 UK working adults, which suggest that online meetings are more efficient for smaller gatherings of 2 to...Read more...

Journal article

Human-Computer Interaction:

How does working from home during Covid-19 affect what managers do? Evidence from time-use studies

In this research we explore the effects of the forced Work-from-home arrangement during the Covid-19 pandemic on managers. We assess how the sudden and widespread shift to working from home during the pandemic impacted h...Read more...

Journal article

International Economic Review:

Estimating border effects: the impact of spatial aggregation

Trade data are typically aggregated across space. In this article, we investigate the sensitivity of gravity estimation to spatial aggregation. We build a model in which micro regions are aggregated into macro regions. W...Read more...

Blog

What Works Centre for Local Economic Growth:

What are the local implications of working from home?

Helene Donnat summarises the discussion of the What Works Growth's fourth Economic Recovery workshop, which discussed working from home: whether the trend is likely to persist and how it will affect workers - both in off...Read more...

Blog

VoxEU:

Covid-19 and structural change

Covid-19 has had a sizeable impact on where people work and how they shop. This column uses data from the Decision Maker Panel business survey of 3,000 UK firms to assess the longer-run impact. The pandemic is expected t...Read more...

CEP discussion paper

Internet access and its implications for productivity, inequality and resilience

About one-fifth of paid workdays will be supplied from home in the post-pandemic economy, and more than one-fourth on an earnings-weighted basis. In view of this projection, we consider some implications of home internet...Read more...

CEP Covid-19 analysis

Generation COVID: emerging work and education inequalities

The purpose of this brief paper is to present initial findings from the recently collected LSE-CEP Social Mobility survey, which was undertaken as part of our UKRI project `Generation COVID and Social Mobility: Evidence ...Read more...

CEP discussion paper

Work, care and gender during the Covid-19 crisis

We explore impacts of the pandemic crisis and associated restrictions to economic activity on paid and unpaid work for men and women in the UK. Using data from the Covid-19 supplement of Understanding Society, we find ev...Read more...

CentrePiece article

Covid-19 and the work patterns of men and women

Claudia Hupkau and Barbara Petrongolo explore the impact of the pandemic on women's labour market prospects and `home production' responsibilities...Read more...

CentrePiece article

The gig economy and workers' preferences for steady jobs

Is the rise of gig work, freelancing, zero hours contracts and self-employment a result of people wanting such work or because they have no other choice? Nikhil Datta finds that while workers in the gig economy may like ...Read more...

CEP discussion paper

Trade shocks and credit reallocation

The effect of trade liberalization on welfare and economic activity remains one of the most important questions in economics. The literature identifies a number of key determinants that reduce the potential gains from tr...Read more...

CEP discussion paper

Willing to pay for security: a discrete choice experiment to analyse labour supply preferences

This paper investigates the extent to which labour supply preferences are responsible for the marked rise in atypical work arrangements in the UK and US. By employing vignettes in a discrete job choice experiment in a re...Read more...

Journal article

Journal of International Economics:

Globalization and state capitalism: assessing Vietnam's accession to the WTO

What do state-owned enterprises (SOEs) do? How do they respond to market incentives? Can we expect substantial efficiency gains from trade liberalization in economies with a strong presence of SOEs? Using a new dataset o...Read more...

Journal article

China and World Economy:

Fiscal subsidy policy on home appliances: its effects on domestic consumption and exports in China

This paper evaluates the effects of the Home Appliances Going to the Countryside (HAGC) policy, a fiscal subsidy program implemented in China to boost private consumption of home appliances in rural areas from 2007 to 20...Read more...

CEP discussion paper

Economic incentives, home production and gender identity norms

We infer the role of gender identity norms from the reallocation of childcare across parents, following changes in their relative wages. By exploiting variation from a Swedish tax reform, we estimate the elasticity of su...Read more...

CentrePiece article

When innovation policy trumped protectionism: the Reagan years

Giammario Impullitti and colleagues show that it was the Reagan administration's innovation policy - not a retreat from globalisation - that promoted US growth....Read more...

CEP discussion paper

Globalization and state capitalism: assessing Vietnam's accession to the WTO

What do state-owned enterprises (SOEs) do? How do they respond to market incentives? Can we expect substantial efficiency gains from trade liberalization in economies with a strong presence of SOEs? Using a new dataset o...Read more...

CEP discussion paper

Innovation and trade policy in a globalized world

How do import tariffs and R&D subsidies help domestic firms compete globally? How do these policies affect aggregate growth and economic welfare? To answer these questions we build a dynamic general equilibrium growth mo...Read more...

CEP discussion paper

Technology, market structure and the gains from trade

We study the gains from trade in a new model with oligopolistic competition, firm heterogeneity, and innovation. Lowering trade costs reduces markups on domestic sales but increases markups on export sales, as firms do n...Read more...

CEP discussion paper

Subsidizing labor hoarding in recessions: the employment and welfare effects of short time work

The Great Recession has seen a revival of interest in policies encouraging labor hoarding by firms. Short time work (STW) policies, which consist in offering subsidies for hours reductions to workers in firms experiencin...Read more...

Journal article

Journal of Political Economy Macroeconomics :

Innovation and trade policy in a globalized world

How do import tariffs and R&D subsidies help domestic firms compete globally? How do these policies affect aggregate growth and economic welfare? To answer these questions, we build a dynamic general equilibrium growth m...Read more...

Journal article

Journal of World Business:

Emerging economy MNEs: how does home country munificence matter?

Multinational Enterprises (MNEs) from emerging economies (EEs) are establishing operations in advanced economies (AEs), apparently departing from traditional models of internationalization. We explore an under-explored d...Read more...

Journal article

IZA Journal of Labor & Development:

Pathways from school to work in the developing world

This paper uses novel micro data from the ILO-STWT surveys to provide evidence on the duration, endpoint, and determinants of the transition from school to work in a sample of 23 low- and middle-income countries around t...Read more...

Journal article

IZA Journal of Labor and Development:

Pathways from school to work in the developing world

This paper uses novel micro data from the ILO-STWT surveys to provide evidence on the duration, endpoint, and determinants of the transition from school to work in a sample of 23 low- and middle-income countries around t...Read more...

CEP discussion paper

The loss of production work: evidence from quasi-experimental identification of labour demand functions

This paper examines changes in the structure of labour demand in plant-level panel data. I exploit variation in wages across local labour markets induced by the collapse of Finland?s Soviet-dependent industry in the earl...Read more...

Journal article

Journal of International Economics:

Goods trade, factor mobility and welfare

We develop a quantitative spatial model that incorporates a rich geography of trade costs and labor mobility with heterogeneous worker preferences across locations. We provide comparative statics for the unique equilibri...Read more...

SERC/Urban and Spatial Programme Discussion Paper

Enabled to Work: The Impact of Government Housing on Slum Dwellers in South Africa

This paper looks at the link between housing conditions and household income and labour market participation in South Africa. I use four waves of panel data from 2002-2009 on households that were originally living in inf...Read more...

CEP discussion paper

Estimating border effects: the impact of spatial aggregation

Trade data are typically reported at the level of regions or countries and are therefore aggregates across space. In this paper, we investigate the sensitivity of standard gravity estimation to spatial aggregation. We bu...Read more...

Journal article

Journal for Labour Market Research:

The future of the German industrial relations model [Die Zukunft des deutschen Modells der Arbeitsbeziehungen]

The paper examines recent evidence on the erosion of the German industrial relations model. Although its coverage has declined, much of this has occurred in smaller and newer establishments, and compared with Britain, it...Read more...

CEP discussion paper

Retail globalization and household welfare: evidence from Mexico

The arrival of global retail chains in developing countries is causing a radical transformation in the way that households source their consumption. This paper draws on a new collection of Mexican microdata to estimate t...Read more...

CEP discussion paper

European integration and the gains from trade

This chapter discusses whether and how .new quantitative trade models.(NQTMs) can be fruitfully applied to quantify the welfare effects of trade liberalization, thus shedding light on the trade-related effects of further...Read more...

Blog

LSE American Politics and Policy Blog:

Firms with more structured management practices are more productive, innovative and have faster employment growth.

In 2010, the US Census Bureau conducted the first large-scale survey of management practices in America, gathering data on more than 30,000 manufacturing plants. Nicholas Bloom and colleagues find strong links between es...Read more...

CEP discussion paper

Missing gains from trade?

The theoretical result that there are welfare gains from trade is a central tenet of international economics. In a class of trade models that satisfy a 'gravity equation,' the welfare gains from trade can be computed usi...Read more...

CentrePiece article

Are you happy while you work?

Happiness surveys typically ask people to say how they feel about their life experiences in retrospect, but smartphone technology makes it possible to collect responses on wellbeing 'in the moment'. The authors use this ...Read more...

CEP discussion paper

Concentration versus re-matching? Evidence about the locational effects of commuting costs

Using administrative employer-employee data from Germany, I exploit two reductions of tax breaks for commuting in 2003/4 and 2006/7 to estimate commuting costs? effect on the decision to switch job and move house. Standa...Read more...

CEP discussion paper

Firm Heterogeneity and Aggregate Welfare

We examine how firm heterogeneity influences aggregate welfare through endogenous firm selection. We consider a homogeneous firm model that is a special case of a heterogeneous firm model with a degenerate productivity d...Read more...

CEP discussion paper

Does Working from Home Work? Evidence from a Chinese Experiment

About 10% of US employees now regularly work from home (WFH), but there are concerns this can lead to ?shirking from home.? We report the results of a WFH experiment at CTrip, a 16,000-employee, NASDAQ-listed Chinese tra...Read more...

CEP discussion paper

Are You Happy While You Work?

Recent work in psychology and economics has investigated ways in which individuals experience their lives. This literature includes influences on individuals? momentary happiness. We contribute to this literature using a...Read more...

CentrePiece article

Working or shirking?

Over 10% of US employees now regularly work from home (WFH), but there is widespread skepticism over its impact highlighted by phrases like ?shirking from home?. We report the results of a WFH experiment at Ctrip, a 13,0...Read more...

CentrePiece article

Immigration and the UK labour market

David Metcalf, chair of the Migration Advisory Committee (MAC), outlines recent changes in the regulatory framework for immigrant workers....Read more...

CEP discussion paper

Is the International Border Effect Larger than the Domestic Border Effect? Evidence from U.S. Trade

Many studies have found that international borders represent large barriers to trade. But how do international borders compare to domestic border barriers? We investigate international and domestic border barriers in a u...Read more...

CEP discussion paper

Goods Trade, Factor Mobility and Welfare

This paper extends a recent class of quantitative models of international trade to incorporate factor mobility within countries. We present a model-based decomposition of the variance of economic activity into the contri...Read more...

CEP discussion paper

Does High Involvement Management Improve Worker Wellbeing?

Employees exposed to high involvement management (HIM) practices have higher subjective wellbeing, fewer accidents but more short absence spells than ?like? employees not exposed to HIM. These results are robust to exten...Read more...

CEP discussion paper

Does High Involvement Management Lead to Higher Pay?

Using nationally representative survey data for Finnish employees linked to register data on their wages and work histories we find wage effects of high involvement management (HIM) practices are generally positive and s...Read more...

Government consultation

Department for Work and Pensions - 21st century welfare

Read more...

CEP discussion paper

Welfare Policy and the Distribution of Hours of Work

We examine the distribution of hours of work across industrial sectors in OECD countries. We find large disparities when sectors are divided into three groups: one that produces goods without home substitutes and two oth...Read more...

SERC/Urban and Spatial Programme Discussion Paper

Productivity and Firm Selection: Quantifying the 'New' Gains from Trade

We discuss how standard computable equilibrium models of trade policy can be enriched with selection effects without missing other important channels of adjustment. This is achieved by estimating and simulating a partial...Read more...

CEP discussion paper

Unemployment Insurance and Cultural Transmission: Theory and Application to European Unemployment

This paper emphasizes the two-way causality between the provision of unemployment insurance and the cultural transmission of work ethic. Values affect the size of the moral-hazard problem and, hence, the policy to be imp...Read more...

CEP discussion paper

Economic Geography: A Review of the Theoretical and Empirical Literature

This paper reviews the new economic geography literature, which accounts for the uneven distribution of economic activity across space in terms of a combination of love of variety preferences, increasing returns to scale...Read more...

Journal article

The Economic Journal:

The part-time pay penalty for women in Britain

Women in Britain who work part-time have, on average, hourly earnings about 25% less than that of women working full-time. This gap has widened greatly over the past 30 years. This article tries to explain this part-time...Read more...