Optimizing the Borrowing Limit and Interest Rate in P2P System: From Borrowers’ Perspective

Table 1

Parameters of borrowers in the PPdai lending platform.

Dimensions’ definition	Parameters’ definition	Parameter type	Abbreviation	Remark
Identity information (IDI)	Head portrait	Binary	HPT
	Gender	Binary	GED	Male = true, female = false
	Identity	Binary	IDT	True if identified as a lender, online seller, student, and so on
	Age	Numeric	AGE
	Registration time	Numeric	RET	Number of days since registration
	Profile score	Numeric	PRS	A score based on additional information (e.g., age, education, work, and income)
Borrowing information (BRI)	Amount	Numeric	AMT	Yuan
	Rate	Numeric	RAT
	Period	Numeric	PED	Months
Certification information (CFI)	Identity certification	Binary	IDC
	Video certification	Binary	VDC
	Education certification	Binary	EDC
	Mobile phone certification	Binary	MPC
	Online banking recharge certification	Binary	ORC
Historical transaction information (HTI)	Transaction score	Numeric	TAS	Times of paying off loans (1 point each time)
	Transaction lost score	Numeric	TLS	Times of paying back loans delaying over 15 days (−2 points each time)
Risk rating information (RRI)	Magic-Mirror rating	Categorical	MMR	From AAA to F (8 levels)