China's ongoing urban economic growth has sharply increased the population's per capita income, lowered the count of people living below the poverty line, and caused major environmental problems. We survey the growing literature investigating the causes and consequences of China's urban pollution challenges. We begin by studying how urban population and industrial growth impacts local pollution levels and greenhouse gas production. As the urban population grows richer, its demand for private transportation and electricity sharply increases. Such privately beneficial activity exacerbates urban pollution externalities. Facing these severe environmental challenges, China's urbanites increasingly demand quality of life progress. We survey the emerging literature investigating the demand for environmental progress in China. Progress in mitigating externalities hinges on whether the powerful central and local governments choose to address these issues. We analyze the political economy of whether government officials have strong incentives to tackle lingering urban externalities. We conclude by discussing future research opportunities at the intersection of environmental and urban economics. (JEL O18, P25, P28, Q53, R23, R41, R58)

I study the effects of overvalued equity on acquisition activity and shareholder wealth, using managers’ insider trades to measure overvaluation. I find that overvalued equity drives managers to make stock acquisitions, and such acquisitions destroy value for acquirer shareholders. Overvalued stock acquirers earn negative and lower returns in the short run and substantially underperform similarly overvalued nonacquirer firms in the long run. My results do not support the idea that managers can benefit shareholders by converting overvalued equity into real assets through stock acquisitions.

We consider a dynamic Mirrlees economy in a life-cycle context and study the optimal insurance arrangement. Individual productivity evolves as a Markov process and is private information. We use a first-order approach in discrete and continuous time and obtain novel theoretical and numerical results. Our main contribution is a formula describing the dynamics for the labour-income tax rate. When productivity is an AR(1) our formula resembles an AR(1) with a trend where: (i) the auto-regressive coefficient equals that of productivity; (ii) the trend term equals the covariance productivity with consumption growth divided by the Frisch elasticity of labour; and (iii) the innovations in the tax rate are the negative of consumption growth. The last property implies a form of short-run regressivity. Our simulations illustrate these results and deliver some novel insights. The average labour tax rises from 0% to 37% over 40 years, whereas the average tax on savings falls from 12% to 0% at retirement. We compare the second best solution to simple history-independent tax systems, calibrated to mimic these average tax rates. We find that age-dependent taxes capture a sizable fraction of the welfare gains. In this way, our theoretical results provide insights into simple tax systems.

This paper provides comprehensive, detailed documentation of major corporate governance reforms (CGRs) undertaken by 26 advanced and emerging economies. We investigate whether these reforms have altered investor protection (IP) and impacted corporate investments. Specifically, we estimate the CGRs' impacts on foreign acquirers' tendency to pick better performing firms in emerging markets. We argue the cherry picking is partly due to emerging countries' weaker IP than acquirer countries', predicting a positive relation between the degree of cherry picking and the gap in the strength of IP. Thus, if the CGRs strengthen IP, the gap will decrease (increase) following a CGR in a target's (acquirer's) country, moderating (intensifying) the cherry picking tendency. This is what we find when we estimate difference-in-differences in cherry picking before and after a CGR. These results not only demonstrate the important impacts the CGRs had, but also imply the IP gap between capital exporting and importing countries distorts firm-level allocation of foreign capital inflows and reduces the benefits of globalization.

This paper is a discussion of monetary efficiency, monetary safety, and the relation of the 1933 Glass-Steagall Act to both. It contains speculation about whether a modified version of the Act could have postponed or prevented the crisis of 2008.

Expected consumer's surplus rarely represents preferences over price lotteries. Still, I give sufficient conditions for policies which maximize aggregate expected surplus to be interim Pareto Optimal. Besides two standard partial equilibrium conditions, I assume that feasible prices satisfy a single-crossing property; and each consumer's indirect utility satisfies increasing differences in the price and income. I use the result to extend well-known welfare conclusions beyond the knife-edge quasilinear utility case. Since increasing differences puts no upper bound on risk aversion, the result is useful for applications in which risk aversion is important. (JEL D11, D24, D42, D81, D83, L42)

This paper contributes to the existing literature on the effect of legal status on educational access among immigrant youth in the United States. The Immigration Reform and Control Act (IRCA) of 1986 granted amnesty to undocumented immigrants who entered the United States before 1982. Using a difference-indifferences framework, I analyze the effect of this large amnesty program on immigrant youth's postsecondary educational access. My main finding shows that immigrant youths who were granted amnesty under IRCA are more likely to enroll in postsecondary education.

We provide evidence that firms with more transparent earnings enjoy a lower cost of capital. We base our earnings transparency measure on the extent to which earnings and change in earnings covary contemporaneously with returns. We find a significant negative relation between our transparency measure and subsequent excess and portfolio mean returns, and expected cost of capital, even after controlling for previously documented determinants of cost of capital.

Teenage peers are perceived as being important, but there is little conclusive evidence demonstrating this. This paper uses data on the population of Norway and idiosyncratic variation in cohort composition within schools to examine the role of peer composition in ninth grade on longer-run outcomes such as IQ scores, teenage childbearing, education, and labor market outcomes. We find that outcomes are influenced by the proportion of females in the grade, and these effects differ by gender. Average age and average mother’s education of peers have little impact on teenagers but average father’s earnings of peers matters for boys.