Question:
Which employer did Eugen Slutsky work for in Dec, 1917?

Context:
 Eugen Slutsky works for Kyiv National Economic University named after Vadym Hetman from Jan, 1913 to Jan, 1926. 
 Eugen Slutsky works for Moscow State University from Jan, 1934 to Jan, 1938. 
 Eugen Slutsky works for Institute of Conjuncture from Jan, 1926 to Jan, 1930. 
 Eugen Slutsky works for Steklov Institute of Mathematics from Jan, 1939 to Jan, 1948.

Answer:
Kyiv National Economic University named after Vadym Hetman