Innovation Efficiency of High-Tech SMEs Listed in China: Its Measurement and Antecedents

Table 1

Brief description of input and output variables.

Index	Variable	Interpretation of indicators
Input index	R&D personnel	The number of technical personnel of enterprise per year
	R&D expenditure	The enterprise’s annual total expenditure on R&D activities
	Fixed assets	The enterprise’s annual total fixed assets
Output index	Patent application	The number of patent application of enterprise per year
	Main business income	The enterprise’s annual main business income