Application of Data Mining in Effect Evaluation of Lean Management

Table 2

Selection of control variables of the regression model.

Control variable	Code	Relevant description
Enterprise scale		Natural logarithm of asset scale in the year before lean management
Lean management scale		Lean management transaction volume/total assets at the end of the year
Debt ratio		Total liabilities/total assets of the enterprise
Equity concentration		Shareholding ratio of the top 5 shareholders of the enterprise