TABLE 4—

Two-Stage Least Square Instrumental Variable Regressions of Logged Zip Code–Level Mortgage Default Rates on Logged Metropolitan Statistical Area–Level Influenza Severity (Instrumented With Weather Patterns): United States, 2004–2012

Search/Delinquency Rate	Credit Card Defaults, b (95% CI)	Mortgage Defaults, b (95% CI)
Logged influenza searches
30-d	–0.007*** (–0.010, −0.004)	–0.005*** (–0.007, −0.003)
60-d	0.000 (0.000, 0.001)	0.000 (–0.002, 0.001)
90-d	0.007*** (0.005, 0.010)	0.001* (0.001, 0.002)
Any	–0.001 (–0.004, 0.003)	–0.003 (–0.007, 0.001)
Constant
30-d	0.278*** (0.249, 0.308)	0.184*** (0.159, 0.209)
60-d	0.131*** (0.105, 0.156)	0.058*** (0.040, 0.077)
90-d	0.032*** (0.009, 0.056)	0.018*** (0.004, 0.032)
Any	0.387*** (0.347, 0.426)	0.241*** (0.212, 0.270)

Note. CI = confidence interval. Standard errors are corrected for clustering. First-stage 2-stage least square instrumental variable results show F test of 23.68. The 10% Stock–Yogo maximal cutoff instrumental variable was 19.93.

*P < .05; **P < .01; ***P < .001.