Economics: Research Guide

Using a continuous-time overlapping generations model with semi-endogenous growth, this study examines the impact of population aging on inequality. We characterize the stationary distribution of income and wealth among households and investigate how an increase in life expectancy and a decrease in birth rate affect the distributional profile. The numerical experiments revealed that an increase in life expectancy lowers inequality, whereas a decrease in birth rate increases inequality. We also consider extended models with exogenous productivity growth, agents' retirement from labor participation, and endogenous labor supply.

The contributions of economists have long included both positive explanations of how economic systems work and normative recommendations for how they could and should work better. In recent decades, economics has taken a strong empirical turn as well as having a greater appreciation of the importance of the complexities of real-world human behaviour, institutions, the strengths and failures of markets, and interlinkages with other systems, including politics, technology, culture and the environment. This shift has also brought greater relevance and pragmatism to normative economics. While this shift towards evidence and pragmatism has been welcome, it does not in itself answer the core quest..

We examine the relationship between family size and human capital among academics in Northern Europe over the two centuries prior to the Industrial Revolution. To measure scholars' human capital, we develop a novel and consistent approach based on their publications. We find that scholars with a high number of publications shifted from having more siblings to having fewer than others during the first half of the 18th century. This shift is consistent with an evolutionary growth model in which the initial Malthusian constraint leads the high human capital families to reproduce more, before being endogenously substituted by a Beckerian constraint with a child quality-quantity tradeoff. Our res..

This study examines the effect of negative replications on the citation rates of replicated studies. It makes three contributions. First, we explain why previous research has not adequately addressed this subject. Second, we develop a matched difference-in-difference (DID) procedure that does not assume parallel trends (PT). Previous research has shown that studies that fail to replicate have different trends prior to replication than studies that successfully replicate. Given this difference, imposing the assumption of PT biases estimation of citation effects. Our DID procedure avoids this bias. Lastly, we study a set of 204 replicated studies and investigate whether there is a citation pen..

This paper investigates the potential impact of extended school days in reducing teenage fertility. We study the Jornada Escolar Extendida program, which doubled the school-day length from 4 to 8 hours in the Dominican Republic, and exploit the geographic and time variation induced by its gradual implementation. We find evidence that a higher exposure to JEE in the municipality, measured as the percentage of secondary students covered by the program, reduces the incidence of teenage pregnancies, and that the effect is stronger after the program has reached at least half of secondary students in the municipality. The estimates are robust to various specifications and alternative checks. These..

The total fertility rate (TFR) in Korea fell to the historically lowest value of 0.78, reaching the state of super low fertility, also similarly observed in other East Asian countries. We quantitatively assess future implications of super low fertility on housing markets using an overlapping generations (OLG) general equilibrium model, which features housing markets and demographic transitions. The results predict that while the current housing boom will continue in the near future, real housing prices will eventually decline after 2035 because of low fertility. Among government policies, increasing the housing supply or the birth rate can mitigate this long-term housing boom-bust cycle and ..

Maternal sugar consumption in utero may have a variety of effects on offspring. We exploit the abolishment of the rationing of sweet confectionery in the UK on April 24, 1949, and its subsequent reintroduction some months later, in an era of otherwise uninterrupted rationing of confectionery (1942-1953), sugar (1940-1953) and many other foods, and we consider effects on late-life cardiovascular disease, BMI, height, type-2 diabetes and the intake of sugar, fat and carbohydrates, as well as cognitive outcomes and birth weight. We use individual-level data from the UK Biobank for cohorts born between April 1947–May 1952. We also explore whether one’s genetic “predisposition..

Selection bias in genome-wide association studies (GWASs) due to volunteer-based sampling (volunteer bias) is poorly understood. The UK Biobank (UKB), one of the largest and most widely used cohorts, is highly selected. We develop inverse probability weighted GWAS (WGWAS) to correct GWAS summary statistics in the UKB for volunteer bias. Across ten phenotypes, WGWAS decreases the effective sample size by 62% on average, compared to GWAS. WGWAS yields novel genome-wide significant associations, larger effect sizes and heritability estimates, and altered gene-set tissue expressions. The extent of volunteer bias’s impact on GWAS results varies by phenotype. Traits related to disease, heal..

We investigate to what extent volunteer-based sampling of large-scale biobanks biases associations and estimate inverse probability (IP) weights to correct for such bias. Using the UK Biobank (UKB) as an example of a large-scale volunteer-based cohort, and population-representative data from the UK Census as a reference, we compare 21 bivariate associations in both data sets. Volunteer bias in all associations as naively estimated in the UKB is substantial, and in some cases leads to estimates of the wrong sign. For example, older individuals in the UKB report being in better health. Correcting for volunteer bias using IP weights is therefore advised. Applying IP weights reduces 87% of volun..

This paper studies the gendered labor market and demographic effects of trade liberalization in Peru. To identify these effects, we use variation in the exposure of local labor markets to import competition from China based on their baseline industrial composition. On average, the increase in Chinese imports during 1998-2008 led to a persistent decline in the employment share of low-educated female workers but had smaller and transitory effects on the employment of low-educated men. In contrast to the predictions of Becker's model of household specialization, we find that the increase in import competition during this period increased the share of single low-educated people and decreased the..

We investigate the stages of childhood at which parental job loss is most consequential for their child's education. Using Danish administrative data linking parents experiencing plant closures to their children, we compare end-of-school outcomes to matched peers and to closures hitting after school completion age. Parental job loss disproportionally reduces test taking, scores, and high school enrolment among children exposed during infancy (age 0-1). Effects are largest for low-income families and low-achieving children. The causal chain from job loss to education likely works through reduced family income. Maternal time investment partially offsets the effect of reduced income.

We assess the long-term effects of managerial stress on aging and mortality. First, we show that exposure to industry distress shocks during the Great Recession produces visible signs of aging in CEOs. Applying neural-network based machine-learning techniques to pre- and post-distress pictures, we estimate an increase in so-called apparent age by one year. Second, using data on CEOs since the mid-1970s, we estimate a 1.1-year decrease in life expectancy after an industry distress shock, but a two-year increase when anti-takeover laws insulate CEOs from market discipline. The estimated health costs are significant, also relative to other known health risks.

We investigate the causes and consequences of the aging of the scientific workforce. Using novel data on the population of US chemistry faculty members over fifty years, we find that the secular increase in the age of the academic workforce has been mainly driven by the slowdown in faculty hiring combined with later retirements. By contrast, changes in the age at which scientists start their careers only contribute to about 20% of aging. Hiring more new faculty members could rejuvenate the scientific workforce and boost scientific productivity.

In this paper we discuss the importance of families for understanding economic inequality. Family structure can in principle be an amplifier or mitigator of economic inequality. We describe three channels on how families shape economic inequality. First, how people match to form families matters for inequality across families. Second, parental investments in children can amplify existing inequalities across generations. Third, inequality can exist even within families and the economic environment can shape inequality in consumption and leisure between spouses. In this survey we describe these channels and discuss the related literature.

This paper presents novel methodological and empirical contributions to the child penalty literature. We propose a new estimator that combines elements from standard event study and instrumental variable estimators and demonstrate their relatedness. Our analysis shows that all three approaches yield substantial estimates of the long-term impact of children on the earnings gap between mothers and their partners, commonly known as the child penalty, ranging from 11 to 18 percent. However, the models not only estimate different magnitudes of the child penalty, they also lead to very different conclusions as to whether it is mothers or partners who drive this penalty – the key policy concern. ..

This paper builds a world atlas of child penalties in employment based on micro data from 134 countries. The estimation of child penalties is based on pseudo-event studies of first child birth using cross-sectional data. The pseudo-event studies are validated against true event studies using panel data for a subset of countries. Most countries display clear and sizable child penalties: men and women follow parallel trends before parenthood, but diverge sharply and persistently after parenthood. While this qualitative pattern is pervasive, there is enormous variation in the magnitude of the effects across different regions of the world. The fraction of gender inequality explained by child pen..

The warnings of potential climate migration first appeared in the scientific literature in the late 1970s when increased recognition that disintegrating ice sheets could drive people to migrate from coastal cities. Since that time, scientists have modelled potential climate migration without integrating other population processes, potentially obscuring the demographic amplification of this migration. Climate migration could amplify demographic change – enhancing migration to destinations and suppressing migration to origins. Additionally, older populations are the least likely to migrate and climate migration could accelerate population aging in origin areas. Here, we investigate climate m..

How should we compare welfare across pension systems in presence of differential mortality? A commonly used standard utilitarian criterion implicitly favors the long-lived over the short-lived. We investigate under what conditions this ranking is reversed. We clearly distinguish between the redistribution along mortality and income dimensions, and thus between mortality and income progressivity. We show that when mortality is independent of income, mortality progressivity can be optimal only when (i) there is more aversion to inequality in lifetime utilities compared to aversion to consumption inequality, (ii) life is valuable. When the short-lived tend to have lower income, mortality progre..

Black men who witnessed a shooting before turning 12 have household earnings as adults 31 percent lower than those who did not. We present evidence that this gap is causal and is most likely the result of toxic stress; it is not mediated by incarceration and is constant across neighborhood socioeconomic status. Turning to mechanisms related to toxic stress, we study exposure to violence and nurturing relationships during adolescence. Item-anchored indexes synthesize variables on these treatments better than summing positive responses, Item Response Theory, or Principal Components, which all perform similarly. Providing adolescents with nurturing relationships is almost as beneficial as preve..

In this article, we discuss the sources employed and the methodological choices that entailed assembling a novel, individual-level, large panel dataset containing an incredible wealth of data for a full population in the Caribbeans over the long run, the DWI panel. The panel contains over 1.35 million observations spanning 154 years, well over 100 variables, and its records are linked across sources along demographic and geographic lines throughout the entire period. This richness is all the more valuable in light of the limited source’s availability characteristics of the area and is hoped to lead to a renewed debate over our understanding of former slave societies, while fostering collab..

Despite an increasing recognition of the importance of health for economic growth, there is still a lack of understanding of the role of medical innovation in this process. Specifically, what are the causal effects of medical innovation on economic growth and which non-linearities matter in this context? To answer these questions, we propose an R\&D-based economic growth model with overlapping generations in which life expectancy depends on health care utilization per capita and on medical innovation and test the model's implications empirically. We show that a causal pathway from medical innovation to economic growth prevails with life expectancy being an important transmission mechanism. N..

Numerous articles have looked at the connection between adverse birth outcomes (low birth weight or preterm birth) and an individual's later socioeconomic status. To this day very few studies have been conducted that specifically address how delivery and adverse birth outcomes affect families and the homes where children grow up. In this study, I use data from the German Socioeconomic Panel (SOEP) to research the association between adverse birth outcomes and several parental labor market outcomes following childbirth. The analysis indicates that low birth weight and preterm birth are not associated with most of the considered parental labor market outcomes after birth. Initial disparities p..

Despite a recent and dramatic re-evaluation of the health consequences of alcohol consumption, very little is known about the effects of in utero exposure to alcohol on long-run outcomes such as later-life mortality. Here, we investigate how state by year variation in alcohol control arising from the repeal of federal prohibition affects mortality for cohorts born in the 1930s. We find that individuals born in wet states experienced higher later-life mortality than individuals born in dry states, translating into a 3.3% increase in mortality rates between 1990 and 2004 for affected cohorts.

We estimate health associations across generations and dynasties using information on healthcare visits from administrative data for the entire Norwegian population. A parental mental health diagnosis is associated with a 9.3 percentage point (40%) higher probability of a mental health diagnosis of their adolescent child. Intensive margin physical and mental health associations are similar, and dynastic estimates account for about 40% of the intergenerational persistence. We also show that a policy targeting additional health resources for the young children of adults diagnosed with mental health conditions reduced the parent-child mental health association by about 40%.

This study explores the marriage matching of only-child individuals and its outcome. Specifically, we analyze two aspects. First, we investigate how marital status (i.e., marriage with an only child, that with a non-only child and remaining single) differs between only children and non-only children. This analysis allows us to know whether people choose mates in a positive or a negative assortative manner regarding only-child status, and to predict whether only-child individuals benefit from marriage matching premiums or are subject to penalties regarding partner attractiveness. Second, we measure the premium/penalty by the size of the gap in partner's socio economic status (SES, here, years..

Even before the war started, Ukrainian demographic prospects were almost uniquely negative, even in the context of CESEE. Ukrainian population declined steadily over last decade and the war has significantly worsened Ukraine’s already negative demographic outlook, to the extent that a shortage of labour, particularly in certain parts of the country, is highly likely to be one of the main challenges of post-war reconstruction. Our findings show that, regardless of our assumptions regarding the duration of the war and further military escalation, Ukraine’s population will not return to its pre-war level even in 2040, and the decline will be most pronounced in the working-age population. Al..

We examine the mortality effects of a 1947 school reform in Japan, which extended compulsory schooling from primary to secondary school by as much as 3 years. The abolition of secondary school fees also indicates that those affected by the reform likely came from disadvantaged families who could have benefited the most from schooling. Even in this relatively favorable setting, we fail to find that the reform improved later-life mortality up to the age of 87 years, although it significantly increased years of schooling. This finding suggests limited health returns to schooling at the lower level of educational attainment.

Ten percent of Black children in the U.S. spend time in foster care—twice the rate of white children. We estimate unwarranted disparities in foster care placement decisions, adjusting for differences in the potential for future maltreatment by leveraging the quasi-random assignment of cases to investigators. Using a sample of nearly 220, 000 maltreatment investigations, we find that Black children are 1.7 percentage points (50%) more likely to be placed into foster care following an investigation than white children conditional on subsequent maltreatment potential. This disparity is entirely driven by white investigators and by cases where maltreatment potential is present, in which Black ..

We study the mental health of graduate students and faculty at 14 Economics departments in Europe. Using clinically validated surveys sent out in the fall of 2021, we find that 34.7% of graduate students experience moderate to severe symptoms of depression or anxiety and 17.3% report suicidal or self-harm ideation in a two-week period. Only 19.2% of students with significant symptoms are in treatment. 15.8% of faculty members experience moderate to severe depression or anxiety symptoms, with prevalence higher among non-tenure track (42.9%) and tenure track (31.4%) faculty than tenured (9.6%) faculty. We estimate that the COVID-19 pandemic accounts for about 74% of the higher prevalence of de..

Heathcote et al. (2010) conducted an empirical analysis of several dimensions of inequality in the United States over the years 1967-2006, using publicly-available survey data. This paper expands the analysis, and extends it to 2021. We find that since the early 2000s, the college wage premium has stopped growing, and the race wage gap has stalled. However, the gender wage gap has kept shrinking. Both individual- and household-level income inequality have continued to rise at the top, while the cyclical component of inequality dominates dynamics below the median. Inequality in consumption expenditures has remained remarkably stable over time. Income pooling within the family and redistributi..