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Patent races and optimal patent breadth and length

Article Abstract:

The patent breadth-length optimal mix is seen as relatively dependent on the breadth of the patent and the existing relationship between social welfare and post-innovation profits. It is because of such factors that various economic models and examples are observed to give contradicting conclusions. It is then noted that the reduction of a breadth of a patent results in added competition in the product market after the innovation.

Analysis, Technological innovations, Social services, Social service, Patents

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A note on Matsushima's regularity condition

Article Abstract:

The regularity condition postulated by H. Matsushima does not imply the compatibility condition of C. d'Aspremont and L.-A. Gerard-Varet. An example which argues the falsity of Matsushima's proposition is provided. An improved version of Matsushima's proposition can be supported, however, provided that efficient public decision rules can be fulfilled with budget-balancing systems under conditions of weak regularity condition.

Decision theory

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Fixed agenda social choice theory: correspondence and impossibility theoremsfor social choice correspondences and social decision functions

Article Abstract:

An analysis of fixed agenda social choice theory is presented. The analysis focuses on the development of correspondence and impossibility theorems for such choices. The operation of the collective chocierule on subsets of a universal set of alternatives is then considered. It is shown that the collective choice framework simulates the results of a fixed agenda system where only one particular set of alternatives is given.

Welfare economics

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