Part I: Billionaire Taxes, "https://ssrn.com/abstract=3326615" https://ssrn.com/abstract=3326615.Part III: After Paying Ultra-High Net Worth Wealth Taxes, How Much Would Billionaires Have Left to Live on?, "https://ssrn.com/abstract=3340925" https://ssrn.com/abstract=3340925.Key Takeaways: -...