Text ( visual ) : unmediated Efficiency and optimality in a heterogeneous capital model, putty-cray / by Guillermo A. Calvo. -- Ann Arbor, Mich. : University Microfilms International , 1977. -- vii, 127 leaves ; 22 cm. -- Reprint of the author's thesis (Ph.D)--Yale University, 1973 ; Bibliography : p. 126-127. -- (BA66061134) ; https://ci.nii.ac.jp/ncid/BA66061134 Author Heading(s): Calvo, Guillermo