All 30 Uses of

however
in
Freakonomics

Real-estate sales, however, are a matter of public record.†
p. 6.7

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.

Unless you have more information, however, it's hard to say what's causing what.†
p. 9.2

A year earlier, however, these students did even worse, averaging just 4.1 on their fifth-grade tests.†
p. 31.2 *

He only had the resources to retest 120 classrooms, however, so he asked the creators of the cheating algorithm to help choose which classrooms to test.†
p. 34.1

Yes, shorting the bagel man is white-collar crime, writ however small.
p. 45.5 *

however = regardless of how

There are, however, several good holidays: the weeks that include the Fourth of July, Labor Day, and Columbus Day.†
p. 48.7

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.

But within barely a decade, the Klan had been extinguished, largely by legal and military interventions out of Washington, D.C. If the Klan itself was defeated, however, its aims had largely been achieved through the establishment of Jim Crow laws.†
p. 52.5

Later, however, in the cool-headed calm of your home, you can use the Internet to find out exactly how much the dealer paid the manufacturer for that car.†
p. 65.4

It does, however, indicate that when a real-estate agent labels a house "well maintained," she may be subtly encouraging a buyer to bid low.†
p. 71.2

They did, however, pay dues to the gang—some for protection from rival gangs, others for the chance to eventually earn a job as a foot soldier.†
p. 97.4

A third of them, however, were typically imprisoned at any time, a significant downside of an up position in an illicit industry.†
p. 99.6

By the 1980s, however, the courts had begun to radically reverse that trend.†
p. 109.7

Rudolph Giuliani, however, did not become mayor—and install Bratton until early 1994.†
p. 128.4

There was another demographic change, however, unforeseen and long-gestating, that did drastically reduce crime in the 1990s.†
p. 136.6

Perhaps the most dramatic effect of legalized abortion, however, and one that would take years to reveal itself, was its impact on crime.†
p. 139.7

One hundred years earlier, however, L. Emmett Holt cautioned that a baby is not a "plaything."†
p. 148.6

The per-hour death rate of driving versus flying, however, is about equal.†
p. 151.8

There was, however, one group of students in Chicago who did see a dramatic change: those who entered a technical school or career academy.†
p. 160.5

A typical black child and white child from the same socioeconomic background, however, have the same abilities in math and reading upon entering kindergarten.†
p. 166.5

It should, however, offer encouragement to the roughly twenty million American schoolchildren being raised by a single parent.†
p. 170.7

Nor, however, does using a computer at home turn a child into Einstein: the ECLS data show no correlation between computer use and school test scores.†
p. 174.9

A caution to prospective parents who are shopping for a "smart" name: remember that such a name won't make your child smart; it will, however, give her the same name as other smart kids—at least for a while.†
p. 199.7

Since the science of economics is primarily a set of tools, as opposed to a subject matter, then no subject, however offbeat, need be beyond its reach.†
p. 13.9

However a person feels about abortion, a question is likely to come to mind: what are we to make of the trade-off of more abortion for less crime?†
p. 142.9

Definitions:

(1) (however as in: However, complications may...)
though (or another expression that connects contrasting ideas)

(Based on idea 1 we might not expect idea 2, but this is a way of saying that even though idea 1 exists, we still have idea 2. Synonyms include in spite of that, despite that, nevertheless, nonetheless, on the other hand, in contrastand but.)
(2) (however as in: However much she tried...)
to whatever degree (regardless of how much; or whatever unspecified amount)
(3) (however as in: However you do it, get it done!)
in whatever way
(4) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Much more rarely (and arguably incorrectly), however can be used to intensify the word how, as when one says "However did you find her?" Grammarians would suggest using two words for that usage: "How ever did you find her?"