A
little while back economist Daniel Klein, a professor at George Mason
University and editor of Econ Journal Watch, and Zeljka Buturovic, a researcher at Zogby International, published an
article entitled "Economic Enlightenment in Relation to College-going, Ideology, and Other Variables" which presented data from a survey about
how people of different ideological stances view economic questions
that, Klein argued, inidcated that people who identify as politically left-wing
showed less undertsanding of basic economics than those identifying as libertarians or
conservatives. He's now calling his own prior claims "partially
vitiated" in a new article by Buturovic and
himself, "Economic Enlightenment
Revisited," based on the results of another
survey which he believes shows that people of different ideologies
are in fact about equally likely to believe falsehoods about
economics, depending on how comfortably the answer to a particular question fits with their other beliefs. He attributes his
prior results to a survey that was biased by including too many
questions on issues the Left tends to be bad on and his own eagerness to believe something that supported his own assumptions. (Klein is himself a libertarian.)
I greatly admire Klein's
willingness to publicly state that he believes himself to have been
mistaken on a matter that he had been quite outspoken about. However,
after reading his new article, I don't think he actually was wrong;
at any rate, I don't think the additional data he presents tells
against his own prior conclusion in the way he believes.
In each study, Klein gave
the test subjects a list of statements about economics, such as "free
trade causes unemployment." The survey subjects, all of whom
were American adults, would then write an answer stating that they
(strongly or somewhat ) agreed or disagreed with it, or weren't sure.
Klein then compiled the figures for how often respondents of
different political persuasions agreed with false statements or
disagreed with true ones to get a sense of how well people of
different beliefs understood economic issues. Conservatives and
libertarians did better than liberals on the first survey. Concerned
about the possibility that this result might be caused by an
ideological slant to the survey items (cherry-picking subject matter
so that most or all of the statements concerned areas people on the
Left were especially likely to get wrong, for instance) rather than
an actual difference in knowledge, he did a second survey, this time
with questions intentionally designed to poke at potential
conservative or libertarian blind spots. This time the results were
reversed, with conservatives and libertarians scoring much lower than
on the first survey.
I agree that
the first survey is imperfect. In particular, the survey item
"Third-world workers working for American companies overseas are
being exploited" is problematic because, depending on how one
interprets the word “exploited, ” agreement can be either a sign
of economic ignorance (i.e. you believe that the workers would
benefit economically if they had to fall back on whatever second-best
option they had themselves judged inferior to the sweatshop) or an
answer to a question- in this case, a moral one- other than the one
the survey meant to ask and is intended to assess. (Though if you
changed it to something more economics-specific, such as whether
sweatshop make their workers worse off than they would be in their
absence, I imagine the percentage of wrong answers would still be
pretty high.) I also like the fact that the second survey includes an
item about the economic effects of immigrant workers, an important
and heated subject that was absent the first time around.
However, the first and
second sets of questions differ in some important ways that are
likely to make the first set more genuinely revealing than the
second, because there were serious problems with the second set that
make it questionable whether it measures what it is supposed to be
measuring.
The first issue is that
with the exception of the statement about sweatshops noted above the
first survey consists of fairly clear, unambiguous statements like
"Rent-control laws lead to housing shortages." This isn't
the case with several statements on the second survey, and the result
is that several statements on the second survey can't be trusted to
measure what they're supposed to.
If some of my points here
seem like semantic hair-splitting, it's because such hair-splitting
is incredibly important in order to make sure that a survey is
actually measuring what it's supposed to. Klein and Buturovic's
interpretation of the new data hinges on certain quite specific
assumptions about how survey takers interpreted the survey
statements. If some of the survey statements are worded in a way that
allows for multiple plausible interpretations of what's being asked,
some of which could entail a different answer from the one treated as
correct by the survey for reasons unrelated to economic ignorance,
then responses to that statement on the survey can't be presumed to
measure what it's trying to measure, especially if members of some of
the the different groups being assessed are especially likely to take
a particular interpretation. This is, I believe, the case on at least
three of the survey items. One could argue about whether the word
meanings I think were most likely being used by the typical
respondent are the best way of using those words or not, but like the
interpretation of “exploit” in the first survey that's not a
question of economics.
Two statements to which
the majority of libertarians gave what was judged to be a wrong
response response were "Drug prohibition fails to reduce
people’s access to drugs" and "Gun control fails to
reduce people’s access to guns." The survey treats these
statements as false, since prohibition makes the prohibited item more
costly, so agreeing with them is counted as an incorrect answer in
the respondent's score is.
But is it false? It
depends on what "reducing access" means.
It could mean increasing
the overall cost of getting drugs or guns, which is presumably the
intended interpretation- but it could also be taken to mean, and in
typical language is probably more likely to be taken to mean,
eliminating the ability to acquire something at all or at least
making it so insurmountably difficult that it is effectively
impossible. Klein and Buturovic do acknowledge
this problem, somewhat, but argue in defense of their interpretation
of the responses that “it is reasonable to include price effects as
a dimension of 'access'.”
It is reasonable, but it's
also quite reasonable not to and instead treat access as basically
binary, and I think it very likely that this is what most
respondents- of all ideological types- were doing. In typical usage
the latter meaning is probably more common- it would sound odd to
most people if I said that an increase in the price of a particular
class of products that I had previously been able to buy had lowered
my “access” to them, unless the increase was so large that paying
it was now completely out of reach. Gun and drug laws in the United
States have done no such thing. Some illegal guns can be bought for
less than $100, sometimes significantly less, and even people who
literally own nothing but the clothes on their backs can and
frequently do support illegal drug habits. The non-monetary cost of
is high, due to prohibition- you have to be willing to break the law
and possibly associate with dangerous characters- but it's also one
that anybody can pay if they choose.
Klein and Buturovic also
state they believe that their interpretation would be sound even if
one doesn't interpret “access” in the way they had in mind. They
don't specify what they mean by this. My assumption is that they're
referring to the marginal gun owner or dug user in the absence of
legal restrictions- even if “access” is treated as purely binary
the total number of people with access in that sense would be
decreased by prohibition because there would be some people for whom
drugs or guns are now completely inaccessible who would have had
access if the laws were less restrictive. Again, this is a perfectly
valid way of interpreting the statement, but it's not the only valid
way or the typical way. In contexts like this the word “people”
is almost always means, and will be taken to mean, people in general
or on average or the great majority of people- almost no one will
interpret “reducing people's access” to mean depriving a few
extreme outliers of access or slightly lowering the total sum total
of people who have it.
Guns are readily
accessible even in jurisdictions that forbid them, some of them at
prices so low that anyone who can't afford one now likely couldn't
have afforded one even in the total absence of gun control, and
illegal drugs are so ubiquitous that the government can't even keep
them out of its own prisons. In everyday English the statements "Drug
prohibition fails to reduce people’s access to drugs" and “Gun
control fails to reduce people’s access to guns” are true, even
if there are other valid ways of interpreting the statement under
which it would be false. In the absence of any indication that the
respondents were assuming the definition the creators of the survey
had in mind, there's no reason to assume that choosing “agree”
indicates economic ignorance.
Another
statement on which the study indicates libertarians were more likely
than liberals or progressives to give the wrong answer was "A
dollar means more to a poor person than it does to a rich person,”
which the study treats as true.
If we take this to be
basically a statement about the declining marginal utility of money,
then this is true, but in that case it would be better to phrase such
a question in terms of a single person at different levels of wealth
rather than two different people. As is, the statement entangles
declining marginal utility, a pretty fundamental concept that can
rightly be considered a matter of basic economic understanding with
the more complicated and contested subject of the validity of
interpersonal utility comparisons. People who would choose “disagree”
because the question uses two different men and they don't think such
comparisons are possible or meaningful may or may not be correct, but
even if they're mistaken being on the wrong side of a complex
philosophical dispute is quite a different thing from not
understanding basic economic concepts.
The other and probably
bigger problem is, again, one of ambiguity: There are common uses of
“means more” that do not entail that the statement is true. To
say that "a dollar means more" to person A than to person B
can just as easily be taken to mean that A is more frugal than B, or
drives a harder bargain, or is more miserly, or makes wealth a
greater priority in his life, none of which necessarily suggest that
A has less money. My suspicion is that the differences in answers
between people of different political persuasions boils down to
philosophical differences, with libertarians being more likely to
think of people in terms of their actions and liberals/progressives
more likely to think of them in terms of their needs. In any case,
agreement and disagreement are both defensible answers to the
question as written.
Aside from ambiguous
language, there's another problem with comparing some of the
statements from the first survey with the second one. The statements
about economics in the first survey were, with the exception already
noted, quite straightforward claims on the effects of economic
policies, and "agree" and "disagree" each
represented distinct , dichotomous positions. You believe that
minimum wages or free trade cause unemployment, or that they do not,
for instance, and disagreeing with a statement from the first survey
is a pretty clear statement of what you do believe. Thus, disagreeing
with a wrong statement is a pretty solid indication that your beliefs
on the subject are in fact correct, while agreeing with a wrong
statement means that you are solidly wrong, as opposed to largely but
not entirely correct, and that those who disagreed are closer to the
truth than you are. This is not the case with some of the second
survey.
After the gun control and drug prohibition questions, the
statement which the greatest number of libertarians gave a response counted as wrong to was “When two people complete a voluntary
transaction, they both necessarily come away better off.” This
is something that had no analog of the first survey- it is an
incorrect statement designed to closely mimic a correct one. All
voluntary transactions take place because both participants believe
they will come away better off from it, and- since they have direct
knowledge of their own preferences, usually know more about their own
situation than anyone else, and have more incentive to figure out
whether the transaction is a good idea or not than anyone else- they
are usually correct. The great majority of voluntary exchanges do
benefit the participants- but not all, since sometimes people do
things that, with the benefit of hindsight, were not a good idea even
according to their own preferences and values at the time. Agreeing
with the statement from the survey is thus pushing things too far.
Disagreeing with the
statement, on the other hand, can mean believing anything from "They
almost always come away better off" to "they never come
away better off." We have no reason to believe that the typical
person who correctly chose "disagree" did so because their
own beliefs about the benefits of voluntary exchange are more
accurate than people who chose "agree." Indeed, I would be
surprised if this were the case. The claim that all voluntary
exchanges turn out to be mutually beneficial is too strong, but it
comes much closer to the truth than the belief common among statists,
particularly of a leftist bent, that people frequently or routinely
enter into voluntary agreements that cause them harm.
To a lesser extent I
would make the same criticism of another item, "When two people
complete a voluntary transaction, it is necessarily the case that
everyone else is unaffected by their transaction." This is
false, but there's no way to tell whether a person who answered
"disagree' and got marked as correct was merely thinking "No,
transactions can have externalities," or believes that
externalities not only exist but are so common and so large that most
or all seemingly private agreements are actually a public/government
concern,, or chose "agree" because they believe that they
or society as a whole is harmed in some moral or spiritual sense if
voluntary interactions they don't like are allowed to occur.
The fact that at least one
of the questions on the second survey was, by design, a "trap"
set for people of a particular ideological bent in a way none of the
first survey's items were is a serious problem. This is especially
the case when the format is a essentially a series of true/false
questions where a correct answer of "false" encompasses a
broad spectrum of widely held possible answers, a great many of
which are even less accurate than the false statement in the survey.
Such a survey item is worse than useless for assessing how
knowledgeable different groups are, because the best way for a
particular group of people to be rated as highly enlightened on the
subject by getting the correct answer is abject ignorance- it's only
when you're in the ballpark of being right that you're at risk of
agreeing with the not-quite-right claim and being marked as wrong in
the survey results. It's like a test of scientific knowledge where
respondents have to agree or disagree with the statement “The Earth
is 5 billion years old,” which overstates the Earth's age a bit-
giving the wrong answer requires knowing that the Earth is several
billion years old, while someone who believes that the entire
universe is only a few thousand years old will give the correct
answer by disagreeing.
I think Klein and
Buturovic's concern about possible bias against people on the
political Left in the original survey led them to overcompensate in
the second survey, resulting in the problems described. If anything,
the fact that Klein and Buturovic's attempts to balance against
possible bias against people left of center required them to downplay
the first survey's focus on straightforward claims about the effects
of economic policy in favor of more abstract and/or ambiguously
worded questions and come up with questions that were specifically
designed as traps for other ideologies only seems to underscore the
results of the original survey; at any rate, it doesn't make Klein's
original conclusion that people on the Left knew less about economics
seem less plausible.
So I think Klein is wrong
now about being wrong before. He attributes what he believes to be
his error to confirmation bias, pouncing too eagerly and uncritically
on data that seemed to reinforce his existing beliefs. Based on the
two survey articles, my own impression is just the opposite. Klein
goes so far to guard against his own possible bias against liberals
and progressives that he ends up biasing things in their favor and
against his own (at the time) interpretation of the first survey.
Given Klein's demonstrated willingness to scrutinize his own position
and even publicly criticize his own past conclusions, this is
unsurprising. Monitoring yourself for bias in your own favor
involves the same trade-off as detecting other things: the more
vigilant you are to ensure that nothing gets past you and the more
sensitive you are to possible signs of your quarry, the greater the
chance of a false positive. The direction in which I believe Klein
has actually erred is just the sort you'd want in a person involved with a
publication like Econ Journal Watch- would that more people's mistakes
were the result of going too far to be fair to their opponents!- but
in this case his desire to ensure a level playing field has
backfired.