Abstract The COVID-19 pandemic and the subsequent lockdown brought about an exogenous and unparalleled stock market crash. The crisis thus provides a unique opportunity to test theories of environmental and social (ES) policies. This paper shows that stocks with higher ES ratings have significantly higher returns, lower return volatility, and higher operating profit margins during the first quarter of 2020. ES firms with higher advertising expenditures experience higher stock returns, and stocks held by more ES-oriented investors experience less return volatility during the crash. This paper highlights the importance of customer and investor loyalty to the resiliency of ES stocks.

Please scroll down for article-it is on subsequent pagesWith 12,500 members from nearly 90 countries, INFORMS is the largest international association of operations research (O.R.) and analytics professionals and students. INFORMS provides unique networking and learning opportunities for individual professionals, and organizations of all types and sizes, to better understand and use O.R. and analytics tools and methods to transform strategic visions and achieve better outcomes. For more information on INFORMS, its publications, membership, or meetings visit Abstract. This paper presents an industry equilibrium model where firms have a choice to engage in corporate social responsibility (CSR) activities. We model CSR as an investment to increase product differentiation that allows firms to benefit from higher profit margins. The model predicts that CSR decreases systematic risk and increases firm value and that these effects are stronger for firms with high product differentiation. We find supporting evidence for our predictions.

We study the effects of investor protection on stock returns and portfolio allocation decisions. In our theoretical model, if investor protection is weak, wealthy investors have an incentive to become controlling shareholders. In equilibrium, the stock price reflects the demand from both controlling shareholders and portfolio investors. Due to the high demand from controlling shareholders, the price of weak corporate governance stocks is not low enough to fully discount the extraction of private benefits. Thus, stocks have lower expected returns when investor protection is weak. This has implications for domestic and foreign investors' stockholdings. In particular, we show that portfolio investors' participation in the domestic stock market and home equity bias are positively related to investor protection and provide original evidence in their support. Electronic copy available at: http://ssrn.com/abstract=942513 AbstractWe study the e¤ects of investor protection on equilibrium stock prices, returns and portfolio allocation

In this paper, we study the changes in corporate valuations induced by the adoption of the euro as the common currency in Europe. We use corporate-level data from seventeen European countries, of which eleven adopted the euro. We show that the introduction of the euro has increased Tobin's Q-ratios by 17.1% in the {euro-area} countries that previously had weak currencies. Part of the increase in corporate valuations is explained by the decrease in interest rates and by the decrease in the cost of equity. The increases in Tobin's Q are larger for firms that would be harmed by currency devaluations. Disciplines Finance | Finance and Financial Management CommentsAt the time of publication, author Yrjo Koskinen was affiliated with Boston University School of Management and CEPR. Currently, he is a faculty member at the Wharton School at the University of Pennsylvania. November 2007Electronic copy available at: http://ssrn.com/abstract=508002 AbstractIn this paper we study the changes in corporate valuations induced by the adoption of the