costs since the issue price of new shares would be lower than without the tax. Kenneth Rogoff, Professor of Economics and Public Policy at Harvard University, and formerly Chief Economist at the IMF, argues that "Higher transactions taxes increase the cost of capital, ultimately lowering investment. With a lower capital stock, output would trend downward, reducing government revenues and substantially offsetting the direct gain from the tax. In the long run, wages would fall, and ordinary workers would end up bearing a significant share of the cost. More broadly, FTTs violate the general public-finance principle that it is inefficient to tax intermediate factors of production, particularly ones that are highly mobile and fluid in their response." Progressive or regressive tax An IMF Working Paper finds that the FTT "disproportionately burdens" the financial sector and will also impact pension funds, public corporations, international commerce firms, and the public sector, with "multiple layers of tax" creating a "cascading effect". "[E]ven an apparently low-rate [FTT] might result in a high tax burden on some activities." These costs could also be passed on to clients, including not only wealthy individuals and corporations, but charities and pension and mutual funds. Other studies have suggested that the financial transaction tax is regressive in application—particularly the Stamp Duty in the UK, which includes certain exemptions only available to institutional investors. One UK study, by the Institute for Development Studies, suggests, "In the long run, a significant proportion of the tax could end up being passed on to consumers." Another study of the UK Stamp Duty found that institutional investors avoid the tax due to intermediary relief, while short-term investors who are willing to take on additional risk can avoid the tax by trading noncovered derivatives. The study concluded, therefore, "The tax is thus likely to fall most heavily on long-term, risk-averse investors." Technical feasibility Although James Tobin had said his own Tobin tax idea was unfeasible in practice, a study on its feasibility commissioned by the German government 2002 concluded that the tax was feasible even at a limited scale within the European time zone without significant tax evasion. Joseph Stiglitz, former Senior Vice President and Chief Economist of the World Bank, said, on 5 October 2009, that modern technology meant that was no longer the case. Stiglitz said, the tax is "much more feasible today" than a few decades ago, when Tobin recanted. However, on 7