Knowledge that Transforms

This article explores subjects in optimal income taxation characterized by recent research interest, practical importance in light of concerns about inequality, potential for misunderstanding, and prospects for advancement. Throughout the analysis, paths for further investigation are highlighted. Areas of focus include multidimensional abilities and endogenous wages; asymmetric information and the income of founders; production and consumption externalities from labor effort; market power and rents; behavioral phenomena relating to perceptions of the income tax schedule, myopic labor supply, and the interactions of savings, savings policies, and labor supply; optimal income transfers; the relationship between optimal income taxation and the use of other instruments; and issues relating to the social welfare function and utility functions, including non-welfarist objectives, welfare weights, heterogeneous preferences, and taxation of the family.

This essay reviews Streets of Gold: America’s Untold Story of Immigrant Success by Ran Abramitzky and Leah Boustan. This elegantly written book, whih is a must-read for anyone interested in the topic of immigration, walks the reader through a history of US immigration, examining patterns of immigrant assimilation from the mid-nineteenth century to today. The book challenges two myths about US immigration. First, it shows that historical European immigrants did not always arrive poor and quickly climb the economic and social ladder. Second, it documents that the pace of immigrant assimilation today resembles that prevailing at the turn of the twentieth century.

We review the growing literature on the political economy of immigration. First, we discuss the effects of immigration on a wide range of political and social outcomes. The existing evidence suggests that immigrants often, but not always, trigger backlash, increasing support for anti-immigrant parties and lowering preferences for redistribution and diversity among natives. Next, we unpack the channels behind the political effects of immigration, distinguishing between economic and noneconomic forces. In examining the mechanisms, we highlight important mediating factors, such as misperceptions, the media, and the conditions under which intergroup contact occurs. We also outline promising avenues for future research.

Family income is a positive predictor of children's health, human capital, and later-life earnings, but determining the extent to which these associations reflect causal effects is challenging. A recent wave of natural and randomized experiments, together with increased accessibility of large-scale administrative data, are allowing us to gain new perspectives about the importance of families' monetary resources in the U.S. and other high-income countries. This review pulls the emerging literature together to provide deeper insights into what we know, and what we don't know, about the extent to which policies that provide more generous income transfers could make a difference to children's life chances. My reading of the evidence suggests that policies providing financial resources to economically vulnerable families have the potential to improve children's outcomes. The magnitude of predicted impacts varies considerably across studies, however, and may be related to specific features of the income-generating event that researchers' leverage.

Welfare analysis of policy interventions is ubiquitous in economic research. It plays an important role in merger analysis and antitrust litigation, design of tax and subsidies, and informs the current debate on a universal basic income. This paper provides a survey of existing empirical methods, based on cross-sectional microdata, for calculating welfare effects and deadweight loss resulting from realized or hypothetical policy change. We briefly outline classical parametric methods that are computationally tractable, then discuss recent nonparametric approaches that avoid making statistical and functional-form restrictions on individual preferences. This makes the welfare estimates theoretically more credible, and clarifies exactly what welfare-relevant information is contained in demand distribution in various choice settings. However, these methods also demand greater in-sample variation in the data for practical implementation than classical parametric approaches. We then cover settings with externalities. The above results are theoretical, and take the demand function as known; therefore, we briefly discuss empirical problems around demand estimation. We conclude by suggesting areas for future research.

We use the elements of a macroeconomic production function—physical capital, human capital, labor, and technology—together with standard growth models to frame the role of religion in economic growth. Unifying a growing literature, we argue that religion can enhance or impinge upon economic growth through all four elements because it shapes individual preferences, societal norms, and institutions. Religion affects physical capital accumulation by influencing thrift and financial development. It affects human capital through both religious and secular education. It affects population and labor by influencing work effort, fertility, and the demographic transition. And it affects total factor productivity by constraining or unleashing technological change and through rituals, legal institutions, political economy, and conflict. Synthesizing a disjoint literature in this way opens many interesting directions for future research.