In Koyck method,
\(\beta_k=\beta_0 \lambda^k, k=0,1, \ldots \text { and } 0<\lambda<1,(1-\lambda)\) is known as
1
the rate of decay of the distributed lags.
2
the rate of decline of the distributed lags.
3
the speed of adjustment of the distributed lags.
4
the estimate of the distributed lags.