Table 1 SFR water demand model outputs.

*P < 0.05, **P < 0.01, ***P < 0.001.

Pooled modelCluster A model
(highest income,
high WU)
Cluster B model
(medium income,
medium WU)
Cluster C model
(lowest income,
medium WU)
Model information
  Number of observations1200180660360
  F statistic301.2***
(df = 7; 1192)
101.9***
(df = 7; 172)
204.5***
(df = 7; 652)
108.4**
(df = 7; 352)
Coefficients
  Intercept1.417***2.057***1.749***2.462***
  Temperature (°C)0.082***0.132***0.073***0.054***
  Precipitation (mm)−3.5 × 10−6−4.2 × 10−4−1.3 × 10−4−9.3 × 10−5
  PDSI−0.012**−0.007−0.006−0.003
  Average price [2015$/hundred cubic feet (CCF) water]−0.058***−0.005−0.035***−0.077***
  Unemployment rate (%)−0.031***−0.041**−0.036***−0.018***
  Median household income (2015$/$1000)0.009***0.001*0.005***0.002**
  Number of newspaper articles about the
California drought from nine sources
−0.0018***−0.0015***−0.0016***−0.0011***
Model performance metrics
  Adjusted R20.640.800.680.68
  RMSE12.911.74.03.1
  PBIAS−7.0%−2.1%−1.9%−1.3%
  AIC583.218.2−265.2−323.8