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Table 3 The calendar effect on the daily female births in Italian macro-areas from 1 January 1999 to 30 June 2016

From: One day is not as good as another…at least not across the entire territory of Italy: an analysis of the differences in the daily distribution of births across Italian macro-regions, 1999–2016

  1—NW 2—NE 3—C 4—C 5—IS
IRR S.E. IRR S.E. IRR S.E. IRR S.E. IRR S.E.
Day of the month
 1 0.979** (0.008) 0.988 (0.009) 0.976** (0.010) 0.964*** (0.010) 0.976* (0.013)
 2 0.967*** (0.008) 0.990 (0.010) 0.998 (0.010) 0.993 (0.010) 0.996 (0.013)
 3 0.983** (0.008) 0.996 (0.009) 1.014 (0.010) 1.014 (0.010) 1.005 (0.013)
 4 0.999 (0.008) 0.995 (0.009) 1.000 (0.009) 1.010 (0.010) 1.014 (0.013)
 5 0.979*** (0.008) 0.987 (0.009) 1.001 (0.009) 1.002 (0.010) 1.005 (0.013)
 6 0.972*** (0.008) 0.980** (0.009) 0.991 (0.009) 0.990 (0.010) 1.003 (0.013)
 7 0.974*** (0.008) 0.985 (0.009) 0.995 (0.009) 1.002 (0.010) 1.009 (0.013)
 8 0.992 (0.008) 0.994 (0.009) 1.003 (0.009) 0.999 (0.010) 1.021 (0.013)
 9 0.965*** (0.008) 0.980** (0.009) 0.990 (0.009) 0.993 (0.010) 1.010 (0.013)
 10 0.987 (0.008) 0.985 (0.009) 1.003 (0.009) 1.005 (0.010) 1.012 (0.013)
 11 0.983** (0.008) 0.980** (0.009) 1.004 (0.010) 0.998 (0.010) 1.006 (0.013)
 12 0.974*** (0.008) 0.982** (0.009) 1.001 (0.009) 0.994 (0.010) 1.009 (0.013)
 13 0.964*** (0.008) 0.972*** (0.009) 0.980** (0.009) 0.978** (0.010) 0.978* (0.012)
 14 0.980** (0.008) 0.986 (0.009) 0.990 (0.009) 0.968*** (0.009) 0.996 (0.013)
 15 Ref Ref Ref Ref Ref
 16 0.979** (0.008) 0.989 (0.009) 0.981** (0.009) 0.993 (0.010) 1.007 (0.013)
 17 0.950*** (0.008) 0.959*** (0.009) 0.962*** (0.010) 0.912*** (0.009) 0.969** (0.013)
 18 0.984* (0.008) 1.001 (0.009) 1.011 (0.010) 1.015 (0.010) 1.034*** (0.013)
 19 0.983** (0.008) 0.992 (0.009) 0.994 (0.009) 1.001 (0.010) 1.013 (0.013)
 20 0.989 (0.008) 0.995 (0.009) 1.012 (0.010) 1.012 (0.010) 1.026** (0.013)
 21 0.981** (0.008) 0.987 (0.009) 1.000 (0.009) 1.004 (0.010) 1.007 (0.013)
 22 0.981** (0.008) 0.980** (0.009) 0.996 (0.009) 0.977** (0.010) 1.006 (0.013)
 23 0.987 (0.008) 0.978** (0.009) 0.997 (0.009) 0.986 (0.010) 1.009 (0.013)
 24 0.991 (0.008) 0.998 (0.009) 1.022** (0.010) 1.000 (0.010) 1.017 (0.013)
 25 0.970*** (0.008) 0.978** (0.009) 1.001 (0.010) 0.974*** (0.010) 0.977* (0.013)
 26 0.973*** (0.008) 0.981** (0.009) 0.995 (0.010) 0.991 (0.010) 1.009 (0.013)
 27 0.980** (0.008) 0.988 (0.009) 0.995 (0.009) 1.014 (0.010) 1.019 (0.013)
 28 0.980** (0.008) 0.988 (0.009) 1.001 (0.009) 1.001 (0.010) 1.003 (0.013)
 29 0.966*** (0.008) 0.982* (0.009) 0.980** (0.009) 0.961*** (0.010) 0.987 (0.013)
 30 0.980** (0.008) 0.996 (0.010) 0.992 (0.010) 0.978** (0.010) 0.980 (0.013)
 31 0.968*** (0.010) 0.981* (0.011) 0.967*** (0.011) 0.967*** (0.011) 0.999 (0.015)
Day of the week
 Sunday 0.768*** (0.003) 0.768*** (0.004) 0.719*** (0.003) 0.556*** (0.003) 0.612*** (0.004)
 Monday 0.997 (0.004) 0.988*** (0.004) 0.971*** (0.004) 0.977*** (0.004) 0.995 (0.006)
 Tuesday 1.038*** (0.004) 1.008* (0.004) 1.040*** (0.005) 1.051*** (0.005) 1.079*** (0.006)
 Wednesday Ref Ref Ref Ref Ref
 Thursday 1.037*** (0.004) 0.996 (0.004) 1.016*** (0.004) 0.996 (0.005) 1.021*** (0.006)
 Friday 1.020*** (0.004) 1.026*** (0.005) 0.987*** (0.004) 0.959*** (0.004) 1.015** (0.006)
 Saturday 0.820*** (0.003) 0.828*** (0.004) 0.863*** (0.004) 0.797*** (0.004) 0.810*** (0.005)
 Fri_17 0.961** (0.017) 0.998 (0.019) 0.977 (0.019) 0.947*** (0.020) 0.980 (0.025)
 End/first of the year 0.827*** (0.014) 0.823*** (0.015) 0.798*** (0.015) 0.609*** (0.013) 0.672*** (0.018)
 Civil feast 0.860*** (0.011) 0.848*** (0.013) 0.785*** (0.012) 0.669*** (0.011) 0.688*** (0.015)
 Christmas 0.803*** (0.011) 0.817*** (0.013) 0.759*** (0.012) 0.602*** (0.011) 0.661*** (0.015)
 Other rel. Feast 0.817*** (0.008) 0.831*** (0.009) 0.798*** (0.009) 0.639*** (0.008) 0.680*** (0.011)
 All Souls’ day 0.889*** (0.020) 0.907*** (0.023) 0.847*** (0.022) 0.718*** (0.020) 0.807*** (0.029)
N 6391 6391 6391 6391 6391
 Pseudo R2 0.134 0.119 0.130 0.180 0.150
 Likelihood-ratio test of alpha = 0 (chi-pvalue) 240.1 (0.000) 146.3 (0.000) 159.02 (0.000) 1086.3 (0.000) 243.9 (0.000)
  1. Exponentiated coefficients reported. Controlling for month of birth and for year fixed effects. Standard errors in parentheses
  2. *p < 0.10, **p < 0.05, ***p < 0.01