Table 8.

Nigeria supply response regression with standard GARCH conditional variance.

Variable	Coefficient	Standard error	t-statistic	Prob
C	−53.64573	105.1121	−0.510367	0.6125
Garch	34.94669***	11.99274	2.913986	0.0058
N_exchange_rate	0.040815***	0.016611	2.457175	0.0183
N-pesticide(-1)	0.261861***	0.031358	8.350739	0.0000
N_rainfall	17.09323	29.84814	0.572673	0.5700
N_rainfall^2	−1.202320	2.118680	−0.567486	0.5735
N_Producer_price(-1)	0.394487***	0.115581	3.413094	0.0015

***, ** & * represents significance at the 1 %, 5 % and 10 % level of probability respectively.

Source: Author's computation, 2023