The Efficiency Costs of Dividend Taxation with Managerial Firms*

The paper provides a positive and efficiency analysis of dividend taxation in a corporate agency model with a costly managerial effort. Unlike existing (agency) models, this model is consistent with empirical work in corporate finance and able to predict empirically observed investment responses to dividend taxation. In addition, we show that investment changes are not sufficient to infer, first, the efficiency cost of dividend taxation and, second, the financing regime underlying firms’ investments. We provide a testable implication that allows to empirically uncover the source of investment finance by comparing investment responses to dividend taxes and managerial incentive pay.

Withholding-tax non-compliance: the case of cum-ex stock-market transactions

This paper explores withholding-tax non-compliance in the context of dividend taxation. It focuses on a specific type of stock-market transactions around ex-dividend dates, so-called “cum-ex” trades, which caused considerable revenue losses due to illegitimate tax refunds in Germany and other countries. We use a stylized model of the stock-market equilibrium to analyze the incentives of traders on the German stock market and find that cum-ex trades are only profitable for both buyer and seller in the presence of collusive tax fraud. Our empirical analysis of market data for publicly traded German stocks from 2009 to 2015 confirms that transaction numbers of stocks suitable for cum-ex trades show the expected increase shortly before ex-dividend dates in the period before the tax refunding was reformed. In line with the collusion hypothesis, effects on stock-market prices are not found.