Journal Article Stability of Oligopoly with Product Differentiation Get access Josef Hadar Josef Hadar Case Institute of Technology Search for other works by this author on: Oxford Academic Google Scholar The Review of Economic Studies, Volume 33, Issue 1, January 1966, Pages 57–60, https://doi.org/10.2307/2296641 Published: 01 January 1966

Journal Article A Note on Stock-Flow Models of Consumer Behavior Get access Josef Hadar Josef Hadar Michigan State University Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Economics, Volume 79, Issue 2, May 1965, Pages 304–309, https://doi.org/10.2307/1880634 Published: 01 May 1965

The paper is concerned with conditions under which the proportion of a given asset in the optimal portfolio of a risk averse agent is at least as large as some given proportion. The paper provides a condition that is necessary and sufficient for such a result to hold. The analysis is then confined to portfolios in which the distributions of assets differ by either a first-degree stochastic dominance shift or by a mean-preserving shift. Examples are provided to show that under some conditions a risk averter may invest a smaller proportion of his wealth in the dominating asset than in the dominated asset. The paper then provides conditions that are necessary and sufficient for a risk averter to invest more in the dominating asset.

Josef Hadar, William R. Russell, Tae Kun Seo; Gains from Diversification, The Review of Economic Studies, Volume 44, Issue 2, 1 June 1977, Pages 363–368, h