Tag Archives: economics

Another finding of the obvious from academics…


This study published in the American Journal of Agricultural Economics seems to have a surprising finding, at least to academic economists, that farmers with riskier water supplies rely less on irrigation! What? If you’re uncertain about whether you will get water every year, you are less likely to count on that water to irrigate your crops? Who possibly would think that way?


Not so bad in our estimate…


The University of California ARE Update published a short study that found that the drought emergency regulations adopted by the State Water Resources Control Board were only 18% more costly than the most “efficient” standards. In May 2015, the State Water Resources Control Board adopted Resolution No. 2015-0032 which imposed restrictions to reduce water use by local agencies by 4 to 36 percent depending on their circumstances. Northern California agencies were to reduce usage by 16.2 percent on average, while Southern California utilities were to reduce by 22.5 percent. In the end, Northern California utilities far exceeded their target with a 23.3 percent reduction, and Southern California’s just missed theirs with an average of 21.4 percent. M.Cubed conducted the economic study of the regulations, and found that the insurance benefits were likely substantial enough to justify the costs.

The real headline of the study should be “Drought regulations remarkably efficient!” Given that the regulations were developed in just a few months and that they were done on a prospective basis with uncertainties and unknowns (e.g., the price elasticities referenced in the study), missing the mark by only 18% is truly remarkable. In comparison, the California Air Resources Board may have missed the mark by more than 100% in setting out its AB 32 Greenhouse Gas Reduction Scoping Plan in 2008 by relying too heavily on mandated measures such as renewables generation and certain types of energy efficiencies instead of more effective market based measures.

Nevertheless, the study appears to the make mistake of making the classic economist’s joke “sure it works in practice, but does it work in theory?” Consumers are chastised for behavior that doesn’t fit the fitted values for price elasticities. The study compares the mandated and achieved reductions and notes that achieved reductions were more even across agencies than the mandates. Agencies with lower mandates achieved higher reductions, and those with higher mandates fell short on achievements. Instead of questioning the original price elasticity estimates–and such estimates commonly have a wide range and are often situation specific–the report just plows ahead as though these theoretical results should have driven human behavior.

The more interesting question the researchers should have asked given the consistent patterns in achieved versus mandated reductions is what factors caused these agencies to diverge from the mandates. Geography is clearly only part of the reason. It also appears that there is not as much “demand hardening” at the low end of use, and a higher premium put on water uses at the upper end. These factors have implications for how we should modify our price elasticity estimates.

Views on a sustainable Davis


Two board member of the Valley Climate Action Center, Gerry Braun and Richard Bourne wrote two articles on making building energy use in Davis sustainable and resilient. VCAC board members, including myself, had input into these articles. They reflect a vision of getting to a zero-net carbon (ZNC) footprint while being economically viable. Both were published in the Davis Enterprise.

Vogtle nuke cost could top $25 billion| From Utility Dive

The Vogtle nuclear power plant cost is projected to balloon to more than $12,000 per megawatt. In a study we did for the California Energy Commission in 2009, even at $4,000 per megawatt, nuclear power was uneconomic. This explains why nuclear power is not taken seriously as a solution to reducing greenhouse gas emissions.

Source: Vogtle nuke cost could top $25B as decision time looms | Utility Dive

A response to Environmental and Urban Economics on impact of climate change on counties


I follow Matthew Kahn, now at USC, post on June 30 about the how the “Lucas Critique” undermines a recent study forecasting how counties across the U.S. might be affected differentially by climate change. Quoting the New Palgrave Economic Dictionary, “The ‘Lucas critique’ is a criticism of econometric policy evaluation procedures that fail to recognize that optimal decision rules of economic agents vary systematically with changes in policy.” In other words, individuals within the economy are able to anticipate changing events, including government decisions, and can mitigate the impacts of those events when compared to continuing with the status quo. Kahn puts great faith in the Chicago School premise that individuals can readily adapt to all conditions without government or collective decisions.

However, Kahn ignores two important points. First, he misses the distributional focus of the study, and instead focuses on the overall efficiency gains from the net changes. That’s not the point of the study. We can see on example that land can’t be moved from one county to another, so landowners can’t adapt in anticipation of climate change without significant investment to protect their land. Homeowners will lose value in their homes, and others will find their asset value stranded. Sure, the overall economy will adapt and certain counties may gain enough to offset those losses, but residents within the net loss counties will be worse off. Economics for too long has focused solely on net gains without parsing the impacts and considering how to manage better outcomes for the losers. (I see this failure as one aspect of dissatisfaction driving Trump voters–which brings me to my second point.)

And second, if the Lucas Critique was truly valid, coal miners in Appalachia would have long abandoned their towns as they saw the decline of coal, and the need to satisfy West Virginia coal miners would not be driving national policy today. Instead, we see that people are myopic and these changes are likely to have significant consequences.



Creative Pie Slicing To Address Climate Policy Opposition | Energy Institute at Haas

Severin Borenstein’s post raises an important issue that economists have ignore for too long. I posted the following comment there:

We gave politicians the tool of benefit-cost analysis which they have used to justify their policy objectives, but we completely failed to drive home the requirement that those parties who are on the losing end need to be compensated as well. I looked in my edition of Ned Gramlich’s book on Benefit-Cost Analysis (who taught my course), and the word “compensation” is not even in the index! Working on environmental regulations, I regularly see agency staff derive large positive ratios for the “general public” and then completely dismiss the concerns of particular groups that will be carrying all the burdens of delivering those benefits. If we’re going to teach benefit-cost analysis, we need to emphasize the “cost” side as much as the “benefit” that politicians love to extol.

Source: Creative Pie Slicing To Address Climate Policy Opposition |