Econometrica

Journal Of The Econometric Society

An International Society for the Advancement of Economic
Theory in its Relation to Statistics and Mathematics

Edited by: Guido W. Imbens • Print ISSN: 0012-9682 • Online ISSN: 1468-0262

Econometrica: Jan, 2014, Volume 82, Issue 1

Comment on “The Law of Large Demand for Information”

https://doi.org/10.3982/ECTA11127
p. 415-423

Yaron Azrieli

Say that one information structure is for another if, for every large enough , an ‐sample from the first is Blackwell sufficient (Blackwell (1951, 1954)) for an ‐sample from the second. This note shows that eventual Blackwell sufficiency lies between (one‐shot) Blackwell sufficiency and the ordering of information structures formulated by Moscarini and Smith (2002), and thus offers a new criterion for comparing experiments. A characterization of eventual Blackwell sufficiency in terms of the one‐shot experiments remains an open question.


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