Trend Analysis of Pakistan Railways Based on Industry Life Cycle Theory

Table 8

Time series regression analysis for 1999–2015.

Coefficients	Estimate	Std. error	value
Intercept		1579	4.147
Year		109.7	−4.229
Year^2		2.853	4.307
Year^3		0.03288	−4.381
Year^4		0.0001417	4.450

, , and indicate 1%, 5%, and 10% significance level, respectively; ; .