Monday, October 12, 2015

Paging Professor Slutsky



Will a weaker tenge weaken the colleges?

In August, the National Bank of Kazakhstan decided to let the market set the tenge’s exchange rate.  English speakers call this a “float”; Russian speakers, a “swim.” In any case, it was a deep dive. In a few weeks, the currency fell from just under 200 tenge per US dollar to nearly 300, until the National Bank waded into the forex market to haul the tenge back to about 270 to 275.
  
What does this mean for you?  Well, each tenge has less foreign purchasing power than before, so import prices – which are expressed in tenge -- should rise.  A $1 pencil that had cost 200 tenge will now cost 275.  The price hike will tempt domestic producers, who compete with importers, to add a few zeroes to their pricetags, too.  The given income of a typical Kazakhstani -- the monthly wage averages 125,000 tenge -- will buy fewer CDs, steaks, and college courses than before.  Are the universities headed for trouble?  

The usual answer is yes.  People buy less education when they are poor rather than rich. But this is only half of the argument: Although the tenge depreciation will eventually reduce income for a while, it may lower the price of an education.  Folks may sign up for more courses.  I’ll explain.

Buyers choose between apples and oranges, Beatles and Bach, good A and good B.  Their decision depends on the price of A relative to the price of B.  If an apple costs as much as an orange, then we may divide our spending equally between them.  But if an apple costs as much as two oranges, then we may buy more oranges than apples.

A college education is like that orange.  Many sellers – like hotels and grocers – can raise their prices whenever they want, but colleges are not so privileged.  They set their tuition rates before the fall semester, since a student who enrolls in the autumn is pretty likely to stick around for the spring semester, too.  As it happens, the National Bank put the tenge on a float after the usual time when universities announce their new rates.  Depreciation may not affect tuition rates much until next fall.  Meanwhile, since tuition rates hold constant and hotel rates rise, the price of a course may fall relative to the price of a holiday.  Youths may study more and surf less.  And they may study in Kazakhstan rather than abroad, because the tenge buys less of foreign education than it had before.  Foreign education is an import. 

All in the family

So are the pessimists wrong to foretell trouble for campuses?  Not necessarily.  The depreciation does lower real income in Kazakhstan, and poorer people do cut back on classes.  But this “income effect” is offset by the “substitution effect.” The net effect is not clear.

Early in the 20th century, the Russian economist and mathematician Eugen Slutsky thought about the general problem.  He pointed out that the size of the income effect depends on the commodity’s importance to the household budget.  If you spend half of your income on food, then a rise in food prices may squash your purchasing power.  But a price hike of a commodity that you never buy (used toothbrushes?) may have no income effect for you.

So, whether depreciation of the tenge is bad news for campuses depends on the share of the household budget dedicated to education.  For the average Kazakhstani family, the share is small; spending on all education amounted to 3.4% of gross domestic product in the first half of 2015.  But for a family with potential college students, the expected share may be distressingly large. In the latter case, yes, depreciation may induce families to cut back on a lot of purchases, including higher education.  Cap-and-gown manufacturers, take note.  Leon Taylor tayloralmaty@gmail.com


Good reading

Mark Blaug.  Great economists before Keynes: An introduction to the lives & works of one hundred great economists of the past.  Cambridge University Press.  1986.  Includes a brief article about Slutsky.


References

Kazakhstan Committee on Statistics.  This government agency provided the estimate of the share of education in income.  www.stat.gov.kz

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