The Correlation between Enterprise Internal Control Quality and Research and Development Investment Intensity

Table 1

Variable definitions.

Variable type	Variable name	Variable symbol	Variable declaration
Explained variable	R&D investment intensity	R&D	R&D expenditure/total assets at the beginning
Explanatory variable	Internal control quality	ICQ	Natural logarithm of the DIB database internal control index
Intervening variable	Cash-holding level	Cash	(Monetary capital + tradable financial assets)/total assets
Control variable	Enterprise size	Size	Natural logarithm of the total assets
	Enterprise growth	Growth	Growth rate of operating income
	Corporate profitability	ROA	Net profit/total assets
	Government R&D subsidy	SUB	Natural logarithm of the government subsidy