1 son, Christopher Stephen. Came to the United States 1937. Honorary lecturer statistics U. Cracow (Poland), 1931-1936, honorary lecturer economics, statistics 1936.
Lecturer economics University of Michigan, 1936. Honorary lecturer economics Polish Free U., Warsaw, 1937. Lecturer economics University of California, 1937-1938, Stanford, 1938.
Assistant professor economics University of Chicago, 1939, associate professor, 1939-1943, became professor, 1943. Ambassador of Poland to the United States, 1945-1946. Polish representative United Nations Security Council, 1946-1948.
Author: Foundation of Towns on German Law in Western Poland in the Middle Ages, 1925. Statistical Investigation of Economic Fluctuations, 1931. Die Preisdispersion, 1932.
On the Economic Theory of Socialism, 1938, Price Flexibility and Employment, 1945. Contributor articles and book reviews to various science economics and statistical journals.