The Low Tide Beckons
No more Economics Talk
I will Tweet later.
This has been a very hot summer. For every person on the planet, what is her willingness to pay to avoid this hot summer? So, on a day when it s 93 degrees on average --- how much is Sally in Seattle willing to pay for this day to have been 78 degrees instead?
In a "make versus buy" economy, one can either pay God to not face the 93 degree day in Seattle or one can use a suite of adaptation strategies to cope with the high heat. Basic economic logic teaches us that one's willingness to pay to avoid the heat is bounded by what it would cost you to adapt to the heat. This blog post focuses on the microeconomic determinants of adapting to the heat.
I will argue that at any point in time, this adaptation strategy set is almost infinite dimensional and that the dimensions of the adaptation strategy set grow over time so that it gets ever easier for us to adapt to the high heat. This means that our willingness to pay to avoid facing the extreme heat actually declines over time because it is getting cheaper for us to adapt on our own to the heat. In my 2021 Adapting to Climate Change book, I expand on this point that the Social Cost of Carbon can actually decline over time for many people as their adaptation choice set grows.
Let's start with the marginal cost curve that is familiar to anyone who has taken Econ 101.
Case #1: A firm produces pizza using a linear production function such that pizza=10*Labor and the price of Labor = 2 each.
Given the linear production function, the firm can always make one more pizza if it hires .1 workers. It costs $2 per worker so the marginal cost to the firm of producing an extra pizza =2*.1 = 20 cents and this is a constant function.
Case #2: A firm produces pizza using a concave production function such that pizza=10*square root of Labor and the price of labor is .4 each.
In this case the amount of labor needed to make a pizza can be expressed as = Pizza*Pizza/100 and the $ expenditure to purchase this labor equals Pizza*Pizza/25 . This mechanical marginal cost function is convex.
Given this definition of marginal cost, now let's turn to the marginal cost of avoiding heat. Consider a person in Spain today confronted with high heat where she currently lives and works. Here is her strategy set for adapting;
#1 Move to a cooler place (either outdoors or inside such as below ground). Such migration can be permanent or temporary in an economy featuring cross-city transportation services and AirBNB short term housing.
#2 seek out a shady place with a breeze
#3 turn on air conditioning or go to a public place with air conditioning, A theme in my 2010 Climatopolis book was that if an area is known to face rising summer heat then people will change their durables and their home and work place architecture to be better prepared for the heat. We are not passive victims!!
#4 wear lighter clothing
#5 use a damp towel
#6 drink water
#7 take a Siesta and stop working during the hottest hours
#8 Eat lightly
Each of these adaptation strategies has a financial cost and a time cost. As Gary Becker taught us the full price equals the financial cost + your wage*time cost. For example, migrating will require more time and for high value of time people, this will mean incurring a larger cost.
I will stop here but note the following. Taking permutations of these various options yields an almost infinite dimensional adaptation choice set. Modern climate economics assumes that this choice set is stationary. In truth, it expands on a daily basis as we make progress building higher quality durables such as housing and air conditioning units and as we retire older capital and install newer capital. Modern economics is weak on capital updating problem. John Rust wrote a famous bus engine replacement paper but climate economists haven't incorporated this logic into the updating of the spatial capital stock. My paper with Devin Bunten is one attempt to address this issue.
Once we acknowledge that we have an ever growing set of adaptation strategies that are becoming cheaper and cheaper to use then one becomes more optimistic about the ability of the rich and the poor to adapt to the new serious challenges we face.
One example of the rising permutations. More and more educated people now have the opportunity to engage in Work from Home. These individuals can now more easily take a Siesta on a hot day. This is an example of the permutations of the strategy set listed above.
My critique of modern climate economics is that so many researchers are content to estimate reduced form empirical regressions of the form;
Person i's suffering on day j in location q = constant + b*Extreme heat on day j in location q + U
and take "b" as a physics constant. Assume that "suffering" is measured by lost income and that this can be measured by the statistician.
"b" is an interesting reduced form parameter. It represents a slope that measures at a point in time how much suffering extreme heat has caused to the average person who lives at location q at day j.
My Point is that "b" is determined by all of the factors I discussed above. As society's innovation and urban planning continues; "b" converges to zero over time and this pace of "b" shrinking from a positive number towards zero over time is a measure of our adaptation progress.
I want to see more climate economists exploring the microeconomic determinants of when does "b" change over time and when does it remain constant. Government policies that distort adaptation decisions such as subsidies will likely turn out to be a major determinant of slowing down adaptation.
As the marginal costs of climate adaptation decline, simple economics predicts that more individuals and firms will engage in adaptation (as they compare the benefits to the costs of adaptation) and as they engage in such self protection, the empirical reduced form researcher will estimate climate damage functions showing an ever declining amount of damage caused by climate change.
The Climate Change adaptation literature needs to take basic microeconomic logic about rational choice more seriously and then we will make more progress understanding the pace of adaptation and the frictions that slow down adaptation.
I joined the USC Economics faculty in 2015 and Romain Ranciere also joined that year. Permit me to list the impressive scholars who have subsequently joined our faculty.
In July 2022, a star theorist will join our department as our newest hire.
USC fascinates many people. This list highlights that the hype about us is earned. Note that we continue to build up strength in micro theory, macro, econometrics and applied micro. A balanced, optimistic department.
The next piece of the jigsaw puzzle is to build up a PHD program that trains and places students to achieve their career goals.
The Los Angeles Times rejected my piece that I present below. Of course, I'm trying to sell my new 2022 Going Remote book!!
The New New Geography of Jobs
LeBron James joined the Los Angeles Lakers in 2018. He wanted to live and work in Los Angeles. How many of us have compromised as we live in a place because our work is nearby?
Going forward, a silver lining of the pandemic is that more and more of us will have the option to live where we want to live as we engage in WFH on either a part-time or full time basis. How will this new freedom affect our quality of life?
More educated workers are more likely to be working in occupations and industries that are WFH “friendly”. While a surgeon cannot work from home, a book author can. More and more people have learned due to our experience we gained from the COVID lockdown that we can be quite productive while working at home.
WFH workers reduce their weekly commute time. The rise of WFH allows for staggered work hours removing many peak commuters off the roads. The typical WFH worker saves perhaps 5 hours a week in commute time. Will traffic speeds increase for everyone else? This depends on whether more drivers take non-work related trips when road speeds increase.
WFH workers will have increased freedom in their lives to exercise more, to spend more time with children, to participate in family chores and to co-ordinate their leisure time with their nearby neighbors and friends. This opens up the possibility of new civic engagement. On days when a child is sick or bad weather days, the WFH worker can be productive and caring while at home. This opportunity reduces one’s stress and improves one’s mental health.
In 2021 and 2022, economists have used U.S Postal Service change of address data to study migration patterns. We are already spreading out. People have been moving to the exurbs and bidding up home prices there. People will move to areas where they want to be now that they are “untethered” and can live where they want to live. People who love to ski will move to such areas. Those with an aging mother may move closer to her without facing the same labor market penalty as before the rise of WFH. The ability to seek out cheaper housing will allow families to achieve their goals. One economic study argued that when people live in larger housing that this causes them to have more children!
During this time of deep concern about inequality, will WFH be elitist such that those who are not WFH eligible will be left behind and housing will become unaffordable in areas far from the cities? While these are open questions, economic logic offers several insights. First, with the rise of new WFH communities, there will be a local demand for the service economy as construction workers, teachers and restaurants will be in demand. For those non-WFH workers with a taste for the area’s lifestyle, new opportunities will emerge. Second, home prices do not have to soar in the medium term if real estate developers are allowed to build new housing in these places that have plenty of land. American’s NIMBYism could be a key constraint on how the rise of WFH affects our nations’ geography.
Consider California. Our state is suffering from drought right now and features extremely high home prices. Farmers consume over 75% of the state’s water. If some farmland could be rezoned as suburban housing, then water consumption would decrease and the supply of affordable housing would increase as that land is converted into housing. The rise of WFH helps our state to adapt to climate change and to increase the supply of affordable housing!
Third, our cities feature many durable buildings. If many WFH workers “head for the hills”, this opens up new possibilities for those who want to live in a San Francisco or a Boston to find housing there. This possibility only grows if commercial real estate in these areas is converted into residential buildings.
In the medium term, the rise of WFH opens new opportunities for parents of young children. In the past, many women opted out of the workforce to raise children. WFH opens up the possibility of working part-time for one’s firm while the kids are young. A firm that anticipates this dynamic will continue to mentor such young female workers and this will close the gender earnings gap. In the past, women disproportionately entered fields such as being a pharmacist because of the job’s flexibility. WFH opens up the possibility of more flexibility and thus accommodates our diversity.
In the past, African Americans were under-represented in the Tech Sector. Relatively few African-Americans live in tech cities such as San Francisco and Seattle. Few tech companies have headquarters in Baltimore or Detroit. The rise of WFH raises the possibility of the “best of both worlds”. One can live in Baltimore and work and physically appear from time to time at Amazon HQ2 or a future HQ3. Such tech firms will be able to attract a more diverse workforce and depressed cities such as Baltimore will attract role models who boost the local tax base.
A “New” New Geography of Jobs is now emerging. Those firms that recognize this point will build a stronger, more diverse and more loyal workforce. Those places that compete to attract such workers will enjoy growth and an influx of new blood.’. A stronger America emerges as people can live where they want to live and change their schedules to meet their goals and responsibilities.