NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Denny Ellerman

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NBER Working Papers and Publications

January 2001Sources of Productivity Growth in the American Coal Industry 1972-95
with Thomas Stoker, Ernst R. Berndt
in New Developments in Productivity Analysis, Charles R. Hulten, Edwin R. Dean and Michael J. Harper, editors
 
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