A known result holds that capital taxes should be high in the short run and low or
zero in the long-run steady state. This paper studies the
dynamics of optimal capital taxation during the transition, when a high
rate is no longer optimal but the economy is still in flux. The main
result is that capital should be taxed whenever the sum of the
elasticities of marginal utility with respect to consumption and labor
supply are rising
and subsidized whenever this sum is falling. If the
utility function displays increasing relative risk aversion, this
paradoxically implies that capital should be taxed when the capital stock
is below the modified golden-rule level and subsidized whenever it exceeds
this level. Thus, savings incentives sometimes can be more desirable when
the capital stock is large than when it is small.