This paper derives optimal perfect hedging portfolios in the presence of transaction costs within the binomial model of stock returns, for a market maker that establishes bid and ask prices for American call options on stocks paying dividends prior to expiration.(...)

Momentum strategies based on continuations in stock prices have become increas-ingly popular among academics, money managers, and investors in recent years. While there is little controversy on the profitability of momentum strategies, their implementation is afflicted with many difficulties....

This paper presents a framework to analyze the potential changes in transaction costs due to theintroduction of e-commerce on transactions between businesses. It then illustrates and applies thisframework using internal data from an Internet-based firm to measure process improvements,marketplace...