Empirical Analysis of Supplier Inefficient Investment at Customer Risks Based on Supply Chain Data

Table 2

Definition of investment efficiency regression model variables of Richardson.

Variables	Variable definition
Tobinq	Tobin’s Q = (price per share quantity of circulating shares + net asset per share quantity of noncirculation shares + book value of liabilities)/book value of total assets
Lev	Asset-liability ratio = liabilities/total assets
Cash	Holding amount of monetary capital = monetary capital/total assets
Age	Listing years = observation year- establishment year
Size	Enterprise scale = log(total assets)
Return	Considering the annual return rate of stocks reinvested by cash dividends