A structural model of the spring onion economy is developed to analyze forces affecting the onion-producing sector in Texas. Spring onion prices in Texas are influenced by own shipments, shipments from storage stocks, and variety. Texas's decline in market share is largely the result of expanded...

The structure of industries changes in two major ways. Mergers, acquisitions, and divestitures are considered external factors. In addition, the firm rate of internal growth will influence market concentration. If the firm grows slower than the market, concentration will go down, etc. These two...