**Author**:
Schürger, Klaus**Title**: On the Existence of Equivalent Submartingale Measures**Abstract**: Based on results of Yan (1980) and of Ansel and Stricker (1990)
we characterize those R^d-valued stochastic processes (X_t) satisfying
(II X_t II) C L^P(P) (1\leq p \le \infinity) which are submartingales
w.r.t. a certain equivalent probability measure Q such that the Radon-Nikodym derivative dQ/dP belongs to L^q(P) where p^(-1)+q^(-1)=1.
We also give conditions which guarantee that, additionally, (X_t) is
bounded in L^1(Q).**Keywords**: equivalent martingale measure, no-arbitrage, security
market**JEL-Classification-Number**: 313, 213**Creation-Date**: 10.12.1992**URL**: ../1992/b/bonnsfb229.pdf

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