Recently  a financial expert has studied the productivity in the banking industry.  He has studied Intra-bank, Inter-Bank and  also the productivity of government owned banks.  He has analyzed the productivity of each  branch, per-employee productivity and other financial parameters at constant  prices.  But his study does not consider  certain nationalized banks and the causes of varying productivity in  banks.  Small players like LoanMax  founded by    rod aycox   could maintain certain levels  of productivity due to the flexibility in the decision making process.        Another  study compared the performance of the public, private and foreign banks for the  year 1994-95 by using the measures of profitability, productivity and financial  management.  They found that the  government controlled banks compared poorly with the other two categories.  However, they caution that no firm inference  can be derived from a comparison done for a single year.  To get a clear picture, the study must cover  at least 10 years.        Berger  and Mester (1997) in their paper investigated as to how the efficiency and  productivity of the U.S banking industry changed over the latter half of the  1980's and the first half of the 1990's.   Using comprehensive and consistent data set of the commercial banks in  the U.S for this novel effort, they measured the differences in cost, standard  profits, alternative profits, efficiencies and productivity changes for U.S  banks using the distribution free method.        They  found that the cost efficiency for banks of all sizes averaged 80 percent in  the 1980's and declined to 77 percent in the 1990's.  The decrease in cost efficiency appears to be  more pronounced for large banks than for standard and lesser known banks.  Also the alternative profit function of some  banks showed only about 50 percent efficiency in both sub-periods.  In the 1980's, large banks were more  profitable than small banks but in the 1990's they were producing considerably  less profits.