Definition of capricious | Bee Dictionary of English

s changeable
a capricious summer breeze
s determined by chance or impulse or whim rather than by necessity or reason
a capricious refusal
authoritarian rulers are frequently capricious

Things go quickly out of fashion but the fashion world is so capricious that some previously discarded fabric and color return to favor quite as quickly.
The world over people are buying impulsively now, and often regretting their capricious decisions later.
The capricious system of tariffs and taxes that raise the price of goods are mostly based on outdated political considerations that defy logic and good sense.

County upholds DA's demotion/transfer of outspoken prosecutor
According to a letter from a county labor relations representative to the Government Attorneys Association, the union failed to establish by a preponderance of the evidence in its grievance that Rosen's actions toward prosecutor Jim Sibley were capricious or discriminatory.
June 12, 2013 - San Jose Mercury News
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RIDGEFIELD -- A group of residents is appealing the Planning and Zoning Commission 's decision to permit new retail stores on a mile of Route 7. The appeal, filed in Superior Court of Danbury this month by Residents for Responsible Zoning calls the commission's 5-to-4 vote in May to expand retail zoning to the road "unreasonable, illegal, capricious'' and an abuse of the commission's power.
June 11, 2013 - The News-Times
Stock Picks And Investing Wisdom From Value Guru Marty Whitman
Contrarian value-investing legend Marty Whitman, founder of Third Avenue Management, likes to compare equity investing to the study of abnormal psychology: "You're trying to figure out what the masses think are going to happen to the securities' prices. Stock markets can be capricious." That's why Whitman has always felt most comfortable investing in the most out-of-favor sectors of the stock ...
June 5, 2013 - Forbes

Kevin Rudd in The Age
Fire holds a great terror for us all - its power, its speed, its roar, its relentless destruction, its capricious shifts in course, its wont of mercy,Mr Rudd told parliament.
Richard Blumenthal in Seattle Post Intelligencer
If a statute lacks any standards or guidelines for determining what should be permitted, enforcement may look like it's very selective and even arbitrary,Blumenthal said. "These arbitrary and capricious outcomes demonstrate why we need a...
Paul Keating in The Age
Mr Keating accused Mr McGuinness of having a "prejudiced, capricious and intellectually corrupt mind that was all over the shop depending on what suited his miserable purposes at the time".