Table 4.

Simulation Results: Inconsistent IE estimates as the number of periods increases.

		Periods=3			Periods=9			Periods=12
		Truth	IE	Bias	Truth	IE	Bias	Truth	IE	Bias
Age	1	−1	−0.997	0.003	−1	−2.144	−1.144	−1	−3.016	−2.016
	2	0	−0.002	−0.002	0	0.000	0.000	0	−0.000	−0.000
	3	1	0.999	−0.001	1	2.144	1.144	1	3.017	2.017
Period	1	−7	−6.999	0.001	−17.5	−14.642	2.858	−38.5	−27.407	11.093
	2	0	−0.002	−0.002	−10.5	−8.783	1.717	−31.5	−22.427	9.073
	3	7	7.002	0.002	−3.5	−2.931	0.569	−24.5	−17.441	7.059
	4				3.5	2.928	−0.572	−17.5	−12.462	5.038
	5				10.5	8.785	−1.715	−10.5	−7.470	3.030
	6				17.5	14.643	−2.857	−3.5	−2.493	1.007
	7							3.5	2.494	−1.006
	8							10.5	7.473	−3.027
	9							17.5	12.455	−5.045
	10							24.5	17.441	−7.059
	11							31.5	22.425	−9.075
	12							38.5	27.412	−11.088
Cohort	1	−2	−2.001	−0.001	−3.5	−7.497	−3.997	−6.5	−19.612	−13.112
	2	−1	−0.998	0.002	−2.5	−5.362	−2.862	−5.5	−16.590	−11.090
	3	0	−0.001	−0.001	−1.5	−3.214	−1.714	−4.5	−13.575	−9.075
	4	1	1.004	0.004	−0.5	−1.071	−0.571	−3.5	−10.558	−7.058
	5	2	1.996	−0.004	0.5	1.074	0.574	−2.5	−7.542	−5.042
	6				1.5	3.215	1.715	−1.5	−4.525	−3.025
	7				2.5	5.353	2.853	−0.5	−1.506	−1.006
	8				3.5	7.502	4.002	0.5	1.509	1.009
	9							1.5	4.529	3.029
	10							2.5	7.542	5.042
	11							3.5	10.559	7.059
	12							4.5	13.575	9.075
	13							5.5	16.589	11.089
	14							6.5	19.604	13.104