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Recent trends in formal and analytic solutions of diff. equations : Virtual Conference Formal and Analytic Solutions of Diff. Equations, June 28-July 2, 2021, University of Alcalá, Alcalá de Henares, Spain
This volume contains the proceedings of the conference on Formal and Analytic Solutions of Diff. Equations, held from June 28-July 2, 2021, and hosted by University of Alcala, Alcala de Henares, Spain. The manuscripts cover recent advances in the study of formal and analytic solutions of different kinds of equations such as ordinary differential equations, difference equations, $q$-difference equations, partial differential equations, moment differential equations, etc. Also discussed are related topics such as summability of formal solutions and the asymptotic study of their solutions. The volume is intended not only for researchers in this field of knowledge but also for students who aim to acquire new techniques and learn recent results.
eBook
Does product market competition foster corporate social responsibility? Evidence from trade liberalization
This study examines whether product market competition affects corporate social responsibility (CSR). To obtain exogenous variation in product market competition, I exploit a quasi-natural experiment provided by large import tariff reductions that occurred between 1992 and 2005 in the U.S. manufacturing sector. Using a difference-in-differences methodology, I find that domestic companies respond to tariff reductions by increasing their engagement in CSR. This finding supports the view of \"CSR as a competitive strategy\" that allows companies to differentiate themselves from their foreign rivals. Overall, my results highlight that trade liberalization is an important factor that shapes CSR practices.
Journal Article
Turtle and Tortoise are not friends
At a local zoo, a turtle and tortoise struggle for decades to reconcile their differences until, one day, they need to depend on each other.
Book
WHEN IS PARALLEL TRENDS SENSITIVE TO FUNCTIONAL FORM?
This paper assesses when the validity of difference-in-differences depends on functional form. We provide a novel characterization: the parallel trends assumption holds under all strictly monotonic transformations of the outcome if and only if a stronger “parallel trends”-type condition holds for the cumulative distribution function of untreated potential outcomes. This condition for parallel trends to be insensitive to functional form is satisfied if and essentially only if the population can be partitioned into a subgroup for which treatment is effectively randomly assigned and a remaining sub-group for which the distribution of untreated potential outcomes is stable over time. These conditions have testable implications, and we introduce falsification tests for the null that parallel trends is insensitive to functional form.
Journal Article
Corporate social responsibility as a defense against knowledge spillovers
Research Summary We examine whether companies respond to the threat of knowledge leakage by strategically increasing their engagement in corporate social responsibility (CSR). To obtain exogenous variation in the threat of knowledge leakage, we exploit a natural experiment provided by the rejection of the inevitable disclosure doctrine (IDD) by several U.S. states. Using a difference‐in‐differences methodology we find that, following the rejection of the IDD, companies significantly increase their CSR. Our proposed rationale is that CSR helps mitigate knowledge leakage by (i) reducing employees' propensity to join a rival firm, and (ii) reducing employees' propensity to disclose the firm's valuable knowledge even if they join a rival firm. Evidence from a laboratory experiment, an online experiment, and a survey of knowledge workers is supportive of these arguments. Managerial Summary We study the role of CSR in companies' response to the threat of knowledge leakage—a major managerial challenge that has important implications for firms' innovation and competitiveness. We use three different research designs (an analysis of companies' CSR policies in response to an increased threat of knowledge leakage; a survey of knowledge workers; and an experiment conducted both online and in a laboratory setting). The results show that CSR is perceived to mitigate the threat of knowledge leakage. In particular, (i) CSR reduces knowledge workers' propensity to join rival firms (i.e., they are less likely to “walk”) and, even if they do, (ii) CSR reduces their propensity to disclose the firm's valuable knowledge to their new employer (i.e., they are less likely to “talk”).
Journal Article