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Effectivity functions in social choice

- J. Abdou, H. Keiding
- Mathematics
- 1991

1. Introduction.- 1. Collective decisions and power structure.- 2. Social choice.- 3. Games and game forms.- 4. The effectivity functions of a game form.- 5. Effectivity functions and cooperative… Expand

Existence of equilibrium actions and of equilibrium: A note on the ‘new’ existence theorems

- Anders Borglin, H. Keiding
- Mathematics
- 1 December 1976

Abstract A lemma by Ky Fan, which asserts the existence of a maximal element relative to some ordering (an equilibrium action) in a compact choice set, is extended to a larger class of orderings.… Expand

The core of a cooperative game without side payments

- H. Keiding, L. Thorlund-Petersen
- Mathematics
- 1 August 1987

For cooperative games without side payments, there are several types of conditions which guarantee nonemptiness of the core, for example balancedness and convexity. In the present paper, a general… Expand

On the Maximal Number of Nash Equilibria in ann × nBimatrix Game

- H. Keiding
- Mathematics
- 1 October 1997

Abstract In 7 it was shown that for each odd number y ≤ 2 n − 1, there is an n × n bimatrix game with exactly y Nash equilibria, and it was conjectured that the number 2 n − 1 is an upper bound… Expand

Necessary and sufficient conditions for stability of effectivity functions

- H. Keiding
- Mathematics
- 1 June 1985

An effectivity functionE assigns to every coalitionS of players a familyE (S) of subsetsB of an outcome setA such thatS can force the outcome to belong to any of the setsB inE (S). The effectivity… Expand

An axiomatic characterization of efficiency indices

- F. Christensen, J. Hougaard, H. Keiding
- Mathematics
- 1 April 1999

Abstract An input efficiency index gives a numerical assessment of the degree to which a given input combination falls short of being efficient. A family of axioms are presented which, depending on… Expand

On the Functional Form of an Efficiency Index

- J. Hougaard, H. Keiding
- Mathematics
- 1 March 1998

An input efficiency index gives a numeric assessment of the degree to which a given input combination falls short of being efficient in producing a fixed amount of output. This paper presents a… Expand

The Extended Core of a Cooperative NTU Game

- H. Keiding, Y. Pankratova
- Mathematics, Computer Science
- IGTR
- 1 September 2010

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On the existence of equilibrium in social systems with coordination

- H. Keiding
- Economics
- 1985

Abstract Social systems with coordination were introduced by Vind (1983) as a general model of economic institutions. The present paper gives a general existence theorem for equilibria in social… Expand

Economics of Banking

- H. Keiding
- Business
- 14 October 2015

1. Why are there Banks? 2. The Business Lines of a Bank 3. Basic Concepts of Risk Management 4. Market Risk and Value at Risk Analysis 5. The Loan Contract 6. Credit Rationing 7. Credit Risk 8.… Expand

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