Using quarterly data, the notion of Granger causality is employed to to test the causal relationship existing between advertising and sales of cheese and butter in Canada. Results suggest that advertising expenditures influences sales of both commodities. However, sales appear to influence...

Linear versions of the Almost Ideal Demand System are estimated for US and German coffee imports with the intent of testing for homothetic and non-homothetic weak separability and calculating elasticities. Three different separable groupings are tested and separability restrictions are rejected....