11. The transaction tax jumped almost 70 percent, to $ 236.4 million. 12. John Maynard Keynes was among the first proponents of a securities transaction tax . 13. It is unclear whether a financial transaction tax is compatible with European law. 14. Wrobel's paper highlighted the Swedish experience with financial transaction taxes . 15. They have to pay high commission fees to brokerages and also security transaction taxes . 16. Weir contributed to international campaigns for a financial transactions tax and quality public services. 17. The Robin Hood tax is just a marketing synonym for a financial transaction tax . 18. Argentina introduced a bank transaction tax in 1984 before it was abolished in 1992. 19. To my knowledge, no government has explicitly implemented a transaction tax for this purpose. 20. France is the first European country to impose a transaction tax on share purchases.