Can skill-biased technological change compress unemployment rate differentials across education groups?

Our aim is to explain why the pattern of relative unemployment rates by education groups was non monotonic in most of the OECD countries. In a two-sector matching model, a simple unexpected productivity shock biased against unskilled labor can replicate the observed dynamics. Demographic effects of skill-biased shocks can be related to inequality in the distribution of wealth. Received: 27 April 1999/Accepted: 08 June 2000     

健康状况和健康冲击对工作时间的影响

使用中国健康与养老追踪关于浙江和甘肃两省的预调查数据,估计居民健康存量状况和健康冲击对劳动工作时间的影响。研究采用三种健康状况指标:自评健康状况、四种常见慢性病和日常生活自理能力(ADL),其中自评健康状况还使用了15岁之前的健康状况做工具变量估计。基于Tob it模型的估计结果显示:只要健康状况不是太差,劳动者一般不会选择完全退出劳动力市场,健康状况较差的劳动者会适当减少工作时间。慢性病中,只有关节类的疾病对劳动时间的影响显著,其他疾病对劳动时间没有显著影响。日常生活自理能力强的人工作时间明显要长。健康冲击会显著减少劳动者的工作时间,进而减少收入。尽管男性和女性在工作小时上存在很大差异,但是估计结果显示健康存量状况和健康冲击对工作小时的影响不存在很大的性别差异。     

The effect of work absence on wages and wage gaps in Sweden

We use unique information about short-term absence from the labor market among Swedish employees to investigate the potential wage loss attributed to this type of absence. A reform in the Swedish health insurance system was used as an instrument. The results indicate that women's wages are significantly reduced by work absence due to own sickness, while absence to care for a sick child has no significant wage effect. For men, we find no support for effects on wages from short-term absence. We also show that the distribution of the gender wage gap depends to a large extent on work absence. Received: 29 September 1998/Accepted: 16 April 1999     

A note on the rate of intergenerational convergence of earnings

We show that “convergence” to mean earnings in intergenerational earnings mobility models will be a function not only of the single-generation correlation of earnings, but also of the properties of the unobserved stochastic distribution of shocks to earnings. Received: 24 March 1998/Accepted: 13 November 1998     

The impacts of climate variability on household welfare in rural Mexico

In light of the expected increase in weather variability from climate change, we examine the impact of weather shocks, defined as rainfall or growing degree days more than a standard deviation from their respective long-run means, on household consumption per capita. The analyses suggest that both rainfall and temperature shocks affect both food and non-food consumption. Furthermore, the results show that a household’s ability to protect its consumption from weather shocks depends on the climate region and when in the agricultural year the shock occurs. Especially, households in arid climates are not fully protected from weather shocks occurring during the beginning of the wet season (April, May, June). The results highlight the necessity to account for the underlying climatic variation as well as to carefully define the shocks.     

A longitudinal analysis of the impact of health shocks on the wealth of elders

We investigate the impact of health shocks on wealth, using all four waves of the Health and Retirement Study, and estimate not only the short-term effect but also the long-term effect of health shocks on wealth of the elderly. We find that new health events lower wealth in elders during the period in which such health shocks occur, but the impact tends to disappear over time. We also find that health shocks result in greater wealth depletion when they occur later in life. Together with existing health problems, the overall impact of health problems on wealth increases over time.

Health effects of child work: Evidence from rural Vietnam

We test whether work in childhood impacts on health. We focus on agricultural work, the dominant form of child work worldwide. Data are from the Vietnam Living Standards Survey, 1992–93 and 1997–98. We correct for both unobservable heterogeneity and simultaneity biases. Instruments are land holdings and commune labour market and school quality indicators. We examine three indicators of health: weight-for-age Z-score; reported illness; and, height growth. There is clear evidence of a healthy worker selection effect. We find little evidence of a contemporaneous negative impact of child work on health but, particularly for females, work undertaken during childhood raises the risk of illness up to five years later. For boys, the risk is increasing with the period of time in work. There is no evidence that work impedes the growth of the child. This work was undertaken as part of the Understanding Children's Work project, an inter-agency program between the International Labour Organisation, UNICEF and the World Bank. The views expressed are those of the authors alone and do not reflect positions of the sponsoring organisations. We are grateful to the Government of Vietnam for permission to use the data. We thank two referees for very helpful comments. Responsible editor: Alessandro Cigno.     

Labour supply effects of a cash-for-care subsidy

From 1999, all parents in Norway with children aged one to three, who did not attend publicly subsidised daycare, became eligible for a cash-for-care (CFC) subsidy. One effect of the CFC-subsidy was to increase in the relative price of external child care. This article analyses whether the CFC-subsidy has led to a reduction in the labour supply of mothers. A framework for evaluating policy reforms when reforms are equally and nation-wide accessible is put forward. The results show that the CFC-subsidy has reduced womens labour supply. The results are sustained after controlling for contemporaneous macroeconomic shocks, using a triple difference approach.The author thanks Hege Torp, Erling Barth and Harald Dale-Olsen at The Institute for Social Research, as well as participants at the European Society for Population Economics (ESPE) conference in Bilbao in June 2002, participants at the Lunch-seminar at Statistics Norway, and two anonymous referees for valuable comments. The work is financed by the Norwegian Research Council, grant #137230/530. The financial support is gratefully acknowledged.Responsible editor: Deborah Cobb-Clark.     

影响健康状况差异诸因素的经济学分析——基于Grossman扩展模型的解释

一个普遍的事实是受教育程度高的人群拥有更好的健康状况。然而受教育程度和健康状况的这种关系的具体量化,却因为不同的人群和时间的变化而表现出不同的特征。本文以影响健康状况的诸因素为基础,通过对Grossman模型加以扩展,揭示出了这种关系的具体量化过程并分析了技术进步、政府的医疗政策和疾病的性质在这一过程中的作用。最后利用扩展模型分析的结论,对药品价格下调、医疗保险制度和医疗补贴等公共健康政策做出了分析。     

Effects of prenatal exposure to abnormal rainfall on cognitive development in Vietnam

Population and Environment - The foetal origins hypothesis postulates that shocks while in utero can have long-term detrimental effects on the health and human capital formation of children. Using...     

Dads, disease, and death: determinants of daughter discrimination

Existing evidence suggests that girls are differentially affected by income shocks and changes in bargaining power. Most studies, however, ignore household production and confound differential opportunity costs with changes in income or bargaining power. I disentangle these determinants of gender discrimination??preferences, income and time allocation??by comparing households with varying degrees of parental involvement. Results indicate that, controlling for household fixed effects, reducing the time available for household production has a disproportionately negative effect on daughters. But, for a transitory income shock, daughters?? education is less income-elastic. Increasing mothers?? bargaining power is most effective in narrowing the gender gap.     

Economic growth and stagnation with endogenous health and fertility

This article offers a theory of economic growth, stagnation, and demo-economic transition that originates from external effects of child-bearing, health expenditure, and education under endogenous mortality. Facing a hierarchy of needs, parents always consume and want to have a family. Child quality, measured as a two-dimensional vector of child health and schooling, becomes only affordable when uncontrollable mortality is sufficiently low. Child quality expenditure initiates an economic take-off and convergence towards perpetual growth while its absence may cause convergence towards an equilibrium of economic stagnation and high fertility. This way, the article provides an explanation for diverging growth rates from a cross-country perspective.I would like to thank Noël Bonneuil, Piero Manfredi, Nikolaus Siegfried, Richard Tol, and two anonymous referees for useful comments. Responsible editor: Alessandro Cigno.     

Dads, disease, and death: determinants of daughter discrimination

Existing evidence suggests that girls are differentially affected by income shocks and changes in bargaining power. Most studies, however, ignore household production and confound differential opportunity costs with changes in income or bargaining power. I disentangle these determinants of gender discrimination—preferences, income and time allocation—by comparing households with varying degrees of parental involvement. Results indicate that, controlling for household fixed effects, reducing the time available for household production has a disproportionately negative effect on daughters. But, for a transitory income shock, daughters’ education is less income-elastic. Increasing mothers’ bargaining power is most effective in narrowing the gender gap.     

Parental disruption and the labour market performance of children when they reach adulthood

This paper uses data from the age 33 wave of the British National Child Development Survey (NCDS) to analyze the effects of a parental disruption (divorce or death of a father) on the labour market performance of children when they reach adulthood. The NCDS is a longitudinal study of all children born during the first week of March 1958 in England, Scotland, and Wales. Controlling for a rich set of pre-disruption characteristics, the results indicate that a parental disruption leads to moderately less employment among males and considerably lower wage rates among females at age 33. If pre-disruption characteristics are not controlled for, larger effects are estimated for both males and females. Parental disruption also seems to cause substantial reductions in educational attainment for both males and females. Received: 22 May 1998/Accepted: 27 April 1999     

Climate shocks and the timing of migration from Mexico

Although evidence is increasing that climate shocks influence human migration, it is unclear exactly when people migrate after a climate shock. A climate shock might be followed by an immediate migration response. Alternatively, migration, as an adaptive strategy of last resort, might be delayed and employed only after available in situ (in-place) adaptive strategies are exhausted. In this paper, we explore the temporally lagged association between a climate shock and future migration. Using multilevel event-history models, we analyze the risk of Mexico-US migration over a seven-year period after a climate shock. Consistent with a delayed response pattern, we find that the risk of migration is low immediately after a climate shock and increases as households pursue and cycle through in situ adaptive strategies available to them. However, about 3 years after the climate shock, the risk of migration decreases, suggesting that households are eventually successful in adapting in situ.     

Life Shocks and Homelessness

We exploited an exogenous health shock—namely, the birth of a child with a severe health condition—to investigate the effect of a life shock on homelessness in large cities in the United States as well as the interactive effects of the shock with housing market characteristics. We considered a traditional measure of homelessness, two measures of housing instability thought to be precursors to homelessness, and a combined measure that approximates the broadened conceptualization of homelessness under the 2009 Homeless Emergency Assistance and Rapid Transition to Housing Act (2010). We found that the shock substantially increases the likelihood of family homelessness, particularly in cities with high housing costs. The findings are consistent with the economic theory of homelessness, which posits that homelessness results from a conjunction of adverse circumstances in which housing markets and individual characteristics collide.     

How much did immigrant “quality” decline in late nineteenth century America?

Early twentieth century observers argued that recent American immigrants were inferior, and in particular less skilled, than the old. I estimate wage equations for 1909 allowing for different effects by nationality and for different characteristics on arrival. I then apply the estimated wage differentials to the immigrant composition to measure the effect of changing composition on immigrant earnings. Finally I ask how immigrant earning power changed relative to that of native Americans. I conclude that immigrant “quality” in terms of earnings did decline due to shifting composition but these effects are very small compared with those reported in studies of the post-second World War period. Received: 1 September 1997/Accepted: 6 June 1998     

Immigrant earnings: Language skills, linguistic concentrations and the business cycle

This study of the determinants of earnings among adult foreign-born men using the 1990 Census of Population focuses on the effects of the respondent's own English language skills, the effects of living in a linguistic concentration area, and the effects of the stage of the business cycle at entry into the U.S. labor market. The analysis demonstrates the importance of English language fluency among the foreign born from non-English speaking countries. There is also strong evidence for the complementarity between language skills and other forms of human capital. Furthermore, there is strong evidence using selectivity correction techniques for the endogeneity between language and earnings. Received: 30 November 1999/Accepted: 6 February 2001     

Child mortality and fertility: public vs private education

How does the effect of child mortality reductions on fertility and education vary across educational systems? To answer this question, we develop an overlapping-generations model where altruistic parents care about both the number and human capital of their surviving children. We find that, under a private education system, if income is low initially, the economy converges to a Malthusian stagnation steady state. For a high level of initial income, the economy reaches a growth path in which children’s education rises and fertility decreases with income. In the growth regime under private education, exogenous shocks that lower child mortality are detrimental for growth: fertility increases and education declines. In contrast, under a public education system, the stagnation steady state does not exist, and health improvement shocks are no longer detrimental for growth. We therefore offer a new rationale for the introduction of public education.     

Estimating the effects of immigration in one city

This paper presents a new method of estimating the effects of immigration on the labor market that does not require variations in immigration across cities. With a two-stage CES model that aggregates immigrant groups by age cohorts and aggregates cohorts into effective labor, the econometric estimation and the interpretation of parameters are particularly straightforward. The paper uses data from Hong Kong to estimate the elasticities of complementarity associated with increased immigration. A simulation study indicates that a 40% increase in the stock of new immigrants will lower wages by no more than one percent. Received: 13 August 1997/Accepted: 7 December 1998