Up Or Down? Capital Income Taxation In The United States And The United Kingdom
Empirical evidence suggests that the Effective Marginal Tax Rate (EMTR) on income from capital has increased considerably in both the United States and the United Kingdom over the period 1982-2005. This evidence contradicts the corporate tax literature which predicts that the EMTR should instead fall over time as a result of increasing international capital mobility and higher tax competition between governments. This paper argues that this inconsistency is entirely due to the fact that EMTRs on income from capital are currently computed from versions of the neoclassical investment model which do not take into account financial constraints on dividend policy faced by firms investing in both the United States and the United Kingdom.