The Book deals with the productivity, growth, cost function, Sources of Productivity, Efficiency of labor of Rubber Products manufacturing industries during the Liberalization Era in All India and Kerala state level. The study reveals that the liberalization program initiated for the rapid growth and productivity of the manufacturing sector does not make any improvement in the manufacturing sector especially in the rubber products manufacturing sector in all India and Kerala. The Cost function analysis explains that during the study period the industry works under diminishing returns of scale. The Total factor productivity growth was also declined during the liberalization period. The technological growth was also found negative during the study period. The technological growth was declined worst in Kerala state.