An Intelligence Optimized Rolling Grey Forecasting Model Fitting to Small Economic Dataset

Table 2

The parameter values calculated by GM(1, 1), RM-GM(1, 1), and PRGM(1, 1), respectively.

Year	GM(1, 1)			RM-GM(1, 1)			PRGM(1, 1)
	𝛼	𝑎	𝑏	𝛼	𝑎	𝑏	𝛼	𝑎	𝑏
Financial intermediation
2006	0.500	−0.148	165.061	0.500	−0.148	165.061	0.467	−0.147	164.250
2007					−0.146	190.743	0.850	−0.152	202.890
2008					−0.144	221.805	0.692	−0.162	204.620
2009					−0.143	251.047	0.384	−0.162	204.700
2010					−0.142	291.635	0.411	−0.156	262.010
Real estate
2006	0.500	−0.254	42.152	0.500	−0.254	42.152	0.253	−0.239	39.421
2007					−0.281	35.488	0.317	−0.234	50.558
2008					−0.285	41.182	0.131	−0.217	61.900
2009					−0.278	58.408	0.274	−0.197	100.510
2010					−0.273	78.809	0.009	−0.177	123.310