© 1988 by Biometrika Trust
The second-order Fisher information
Faculty of Economics, Tohoku University Kawauch, Sendai 980, Japan
The paper presents general second-order approximate formulae for the Fisher information of asymptotically normal statistics, and applies the formulae to a stationary time-series model as well as to an econometric simultaneous equation model. Also the second-order conditional information is evaluated for the exponential family and the location family. Conditioned on a second-order ancillary statistic, the second-order information loss of the maximum likelihood estimate is shown to be recovered.
Key Words: Asymptotic distribution Conditionally Edgeworth expansion Fisher information Information loss Second-order efficiency Sufficiency