Many economic models can be formulated as a system of nonlinear equations and solved numerically using a black-box equation solver found in software packages such as EUREKA or MATHEMATICA. Unfortunately, black-box solvers can fail for several reasons and the messages displayed upon termination...

Exports of Canadian natural gas hasten the day when Canadians must pay higher gas prices. Hence the desirability of exporting natural gas is strongly affected by current and future supply costs. In this paper I analyze the interaction of Canadian gas exports, domestic gas prices, and future gas...