Applying of Fuzzy Nonlinear Regression to Investigate the Effect of Information and Communication Technology (ICT) on Income Distribution

Table 2

Nomenclature.

Fuzzy signs and symbols	Description
	Individuals using the Internet
	Gini coefficient
	Mobile cellular subscriptions
	Fixed telephone subscriptions
	Transition variable
	Transition point
	Transition velocity
TF	Transition function
ID	Distribution of income
AI	Artificial intelligence
LC	Lorenz curve
ICT	Information and communication technology
TAR	Threshold autoregressive
STAR	Smooth transition autoregressive
TSK	Takagi–Sugeno–Kang
MAE	Mean absolute error
MSE	Mean square error
RMSE	Root mean square error
MAPE	Mean absolute percentage error
FLSTA	Fuzzy logistic smooth transition autoregressive
	Vector of independent variables
	Linear coefficients
	Nonlinear coefficients