This paper introduces constant-collateral pyramiding trading strategies, which can be implemented in the futures markets. For these strategies, expressions are derived for effective constraints on the number of futures contracts in the trader’s portfolio and on the trader’s wealth....

This paper uses data from the Canadian National Population Health Survey to compare the utilization of general practitioners by elderly immigrants to that of Canadian-born elderly people. The study employs count data regression methods to take into account that the number of visits to general...