M-Pesa, a service operated by the mobile phone network Safaricom in Kenya, allows users to deposit money onto their telephone handsets, transfer e-money to another user with a simple text message, and withdraw cash at one of thousands of outlets throughout the country. The system is safer, cheaper, and far faster than the money transfer systems that it replaced. Although only five years old, M-...

There are two standard views of the Great Depression of the 1930's. Keynesians maintain that the capitalist system is, by its very nature, prone to overproduction and, in the absence of government intervention, excessive inventories will periodically lead to falling prices and to growing unemployment which will further compound the collapse in demand. They advocate public works financed, if nee...

We give a brief introduction to the Gauge Theory of Arbitrage [1]. Treating a calculation of net present values (NPV) and currencies exchanges as a parallel transport in some fibre bundle, we give geometrical interpretation of the interest rate, exchange rates and prices of securities as a proper connection components. This allows us to map the theory of capital market onto the theory of quanti...

The basis for this paper is the pricing of multi-period rate of return guarantees. These guarantees can typically be found in life insurance and pension contracts. We derive closed form solutions, expressed by the cumulative multivariate normal probability distribution, for multiperiod rate of return guarantees on both a money market account and a stock. The guarantees of Hipp (1996), Persson a...

Over the next 10 years a major controversy developed over whether the Federal Reserve recognized or placed enough emphasis on its responsibility for controlling the growth of the money stock. The related question of which operating strategy to follow in controlling the money stock was pushed to the background. Economists can argue at great lengths over the extent to which the Federal Reserve tr...