Federico Heinlein (1912-1999)

Aggregate Matchings ∗ Federico Echenique

This paper characterizes the testable implications of stability for aggregate matchings. We consider data on matchings where individuals are aggregated, based on their observable characteristics, into types, and we know how many agents of each type match. We derive stability conditions for an aggregate matching, and, based on these, provide a simple necessary and sufficient condition for an obs...

García Lorca, Federico

Michael Abercrombie (1912-1979).

Richard Doll 1912–2005

the differences of organic production. However, the exclusion of synthetic pesticides and fertilizers from organic systems is fundamental. Given this, the authors asked, why did the magnitude of differences in species density and abundance vary so much between the different groups they looked at? One factor may be the differential impacts of timing and special scales on the colonization traits ...

Merck's Annual Report, 1912