The effect of a securities transaction tax on price volatility is estimated on a sample of 11 years of quarterly data from 14 stock markets in different countries. No effect, positive or negative, is found if the volatility is assumed to be monnotonously increasing or decreasing in the tax rate....

The effect of tax discrimination of equity capital on the simultaneous choice of financial structure and operational risk is studied in a model with symmetrical information, risk neutral investors, bankruptcy costs and small open economy assumptions. Taxes are either proportional to the amount...