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    LaPorta, Rafael, Florencio Lopez-de-Silanes, and Andrei Shleifer. 2006. “What Works in Securities Laws?” Journal of Finance 61 (1): 1-32. Abstract

    We examine the effect of securities laws on stock market development in 49 countries. We find little evidence that public enforcement benefits stock markets, but strong evidence that laws mandating disclosure and facilitating private enforcement through liability rules benefit stock markets.

    Mulligan, Casey, and Andrei Shleifer. 2005. “The Extent of the Market and the Supply of Regulation.” Quarterly Journal of Economics 120 (4): 1445-1473. Abstract

    We present a model in which setting up and running a regulatory institution takes a fixed cost. As a consequence, the supply of regulation is limited by the extent of the market. We test three implications of this model. First, jurisdictions with larger populations affected by a given regulation are more likely to have it. Second, jurisdictions with lower incremental fixed costs of introducing and ad- ministering new regulations should regulate more. This implies that regulation spreads from higher to lower population jurisdictions, and that jurisdictions that build up transferable regulatory capabilities should regulate more intensely. Consistent with the model, we find that higher population U. S. states have more pages of legislation and adopt particular laws earlier in their history than do smaller states. We also find that the regulation of entry, the regulation of labor, and the military draft are more extensive in countries with larger populations, as well as in civil law countries, where we argue that the incremental fixed costs are lower.

    Mullainathan, Sendhil, and Andrei Shleifer. 2005. “The Market for News.” American Economic Review 95 (1): 1031-1053. Abstract

    We investigate the market for news under two assumptions: that readers hold beliefs which they like to see confirmed, and that newspapers can slant stories toward these beliefs. We show that, on the topics where readers share common beliefs, one should not expect accuracy even from competitive media: competition results in lower prices, but common slanting toward reader biases. On topics where reader beliefs diverge (such as politically divisive issues), however, newspapers segment the market and slant toward extreme positions. Yet in the aggregate, a reader with access to all news sources could get an unbiased perspective. Generally speaking, reader heterogeneity is more important for accuracy in media than competition per se. (JEL D23, L82)

    Glaeser, Edward L, and Andrei Shleifer. 2005. “The Curley Effect.” Journal of Law, Economics, and Organization 21 (1): 1-19. Abstract

    James Michael Curley, a four-time mayor of Boston, used wasteful redistribution to his poor Irish constituents and incendiary rhetoric to encourage richer citizens to emigrate from Boston, thereby shaping the electorate in his favor. As a consequence, Boston stagnated, but Curley kept winning elections. We present a model of using redistributive politics to shape the electorate, and show that this model yields a number of predictions opposite from the more standard frameworks of political competition, yet consistent with empirical evidence.

    Barberis, Nicholas, Andrei Shleifer, and Jeffrey Wurgler. 2005. “Comovement.” Journal of Financial Economics 75 (2): 283-317. Abstract

    Building on Vijh (Rev. Financial Stud. 7 (1994)), we use additions to the S&P 500 to distinguish two views of return comovement: the traditional view, which attributes it to comovement in news about fundamental value, and an alternative view, in which frictions or sentiment delink it from fundamentals. After inclusion, a stock’s beta with the S&P goes up. In bivariate regressions which control for the return of non-S&P stocks, the increase in S&P beta is even larger. These results are generally stronger in more recent data. Our findings cannot easily be explained by the fundamentals-based view and provide new evidence in support of the alternative friction- or sentiment-based view.
    Copyright 2004 Elsevier B.V. All rights reserved.