There is serious drought in the West. Higher prices could encourage a demand side conservation. Los Angeles Department of Water & Power is not doing its part to "solve" the problem. What if I told you that the LADWP charges households different prices for a gallon of water depending on what season it is, how large their lot size is and how many people live in their home? The first criteria sounds reasonable. The next two are insane. For the evidence, click
Los Angeles DWP's Residential Water Pricing Schedule LA DWP has a multi-tiered water pricing schedule such that if you use less then your marginal price per gallon is lower than if you use more. Because of the drought, the tier II water prices will go up by 45% in June 2009 while the tier I prices will stay constant.
Now here is what is interesting. According to the data, consider two families who live in zip code 90024;
Matt Kahn lives in a home with a lot size less than 7,500 and there are 3 people in his house; he stays on the first tier of the water schedule if he consumes
less than 28*748 gallons every two months.
Consider Candy Spelling (Aaron's widow) who lives in the same zip code. Suppose there were 10 people in her home (her staff) and because she has a lot of more than 43,000 square feet. She stays on the first tier of the water schedule if she consumes less than (76+14)*748 gallons every two months! I am paying for a lot of watering of her grass!
LA DWP just proudly announced that it has raised Tier II water prices by 44% but hasn't raised Tier I prices (to protect the poor). But, if the rich who live on big lots all have a sufficiently large Tier I access (the (76+14)*748 gallon segment) then they may never reach the Tier II. In this case, the "new incentive" won't affect anyone's behavior and the drought will continue.
As an economist, I'm used to "state dependent pricing" but I'm not used to this "individual characteristics pricing".
Isn't this discrimination? She faces a different (cheaper) marginal pricing schedule than I do because she has a big staff and a big lot. Is this the right incentive structure to encourage conservation?
I encourage you to draw out our respective "step functions" on a sheet of paper with gallons on the x-axis and marginal cost ($ per gallon) on the vertical axis.