International Comparison of Synergetic Innovation Efficiency and Its Influencing Factors Analysis

Using 1996-2009 panel data of 25 countries,the paper analyzes the national innovation efficiency and its influencing factors by using super-efficiency DEA and DEA-Tobit two-step method.The major findings include: 1) Economic crisis has a negative impact on national innovation efficiency and total factor productivity for every country.Moreover,the decline of TFP is mostly caused by Technical regress;2) China's national innovation efficiency remains at a low level and has overall downward trend during the study period.In addition,technology regress in China is serious;3) The innovation activities of enterprises,universities and research institutions have significant and sustained effect on promoting national innovation efficiency,so their synergetic innovation is effective;4) A country's macro tax rate has Laffer effect on the national innovation efficiency,high and low tax rates are not conducive to promoting national innovation efficiency.