Table 4.
Log-Linear Model Fit Statistics
| Model | df | L2 | p-value | BIC | Δ |
|---|---|---|---|---|---|
| Men (N = 56,200) | |||||
| Baseline Models | |||||
| 0a: Origin + Destination + Period | 27,972 | 244,675 | <.01 | −61,245 | 69.0 |
| 1a: 0a + Origin×Period + Destination×Period | 27,380 | 239,997 | <.01 | −59,449 | 68.5 |
| 2a: 1a + Parameter-ABCD | 27,292 | 27,431 | .28 | −271,052 | 18.2 |
| Period-Varying Topological Mobility Models | |||||
| 3a: 2a + Period×Parameter-A | 26,992 | 24,874 | >.99 | −270,328 | 14.2 |
| 4a: 2a + Period×Parameter-AB | 26,956 | 24,723 | >.99 | −270,086 | 14.1 |
| 5a: 2a + Period×Parameter-ABC | 26,944 | 24,661 | >.99 | −270,017 | 14.1 |
| 6a: 2a + Period×Parameter-ABCD | 26,940 | 24,648 | >.99 | −269,986 | 14.1 |
| 7a: 2a + Period×Parameter-A'B'C'D' | 27,276 | 25,659 | >.99 | −272,650 | 16.0 |
| Women (N = 47,180) | |||||
| Baseline Models | |||||
| 0b: Origin + Destination + Period | 27,972 | 174,593 | <.01 | −126,434 | 66.6 |
| 1b: 0b + Origin×Period + Destination×Period | 27,380 | 166,191 | <.01 | −128,465 | 65.7 |
| 2b: 1b + Parameter-ABCD | 27,292 | 19,635 | >.99 | −274,074 | 15.2 |
| Period-Varying Topological Mobility Models | |||||
| 3b: 2b + Period×Parameter-A | 26,992 | 18,287 | >.99 | −272,193 | 12.3 |
| 4b: 2b + Period×Parameter-AB | 26,956 | 18,154 | >.99 | −271,939 | 12.2 |
| 5b: 2b + Period×Parameter-ABC | 26,944 | 18,102 | >.99 | −271,862 | 12.1 |
| 6b: 2b + Period×Parameter-ABCD | 26,940 | 18,077 | >.99 | −271,844 | 12.1 |
| 7b: 2b + Period×Parameter-A'B'C'D' | 27,276 | 18,879 | >.99 | −274,657 | 13.9 |
Data source: Panel Study of Income Dynamics, 1969 to 2011.
Note: L2 is the log-likelihood ratio chi-square statistic with the degrees of freedom (df) reported in column df. The Bayesian Information Criteria (BIC) = L2 − (df)×log(N), where N is the total number of observations. A: micro-class immobility parameters; B: net micro-class mobility within meso-class parameters; C: net meso-class mobility within macro-class parameters; D: net macro-class mobility within manual/nonmanual sector parameters. Period×Parameter-: interaction between period and mobility parameters. A', B', C', and D' indicate that trend parameters are constrained to be equal across classes at the micro-class, meso-class, macro-class, and sectoral levels, respectively.