Although no two business cycles are alike, most share some common characteristics. The interest-rate-sensitive sectors of the economy -- housing and manufacturing -- tend to lead on the way up and the way down, for obvious reasons. Inflation ebbs during the recession and in the early stages of the recovery. Credit creation drives the upswing.

The recovery from the 2007-2009 financial crisis has been different all around, just as Harvard economists Carmen Reinhart and Kenneth Rogoff predicted in their 2009 book, “This Time Is Different: Eight Centuries of Financial Folly.” It has been a “protracted affair,” featuring extended declines in asset markets, large contractions in output and employment, and an explosion of government debt: three characteristics common to the aftermath of financial crises.

Yet even in the context of the typical post-financial-crisis recovery described by Reinhart and Rogoff, this one has some peculiarities of its own.

Let’s start with housing, whose rise and fall and associated debt were the proximate cause of the crisis. Residential real estate pretty much sat out the first 2 1/2 years of the recovery before getting traction in 2012, with a lot of outside help. The Federal Reserve drove down rock-bottom mortgage rates even more with its purchases of Treasuries and mortgage-backed securities, a program that continues to this day.

Prices Beckon

The traditional leader was a laggard this time, and improvement has been slow in coming -- at least when it comes to construction and sales. Prices of new homes are a different story.

The median sales price of a new single-family home set a record of $271,600 in April, eclipsing the 2007 peak of $262,600. Some of that reflects an increase in median square footage: 2,390 square feet last year compared with 2,235 square feet in 2007, according to annual data from the U.S. Census Bureau.

“They’re clearly not building for first-time buyers,” said Michael Carliner, an economic consultant specializing in housing.

Another part owes to a greater number of sales of higher-priced homes in more desirable areas of the country. The rest is clearly a response to demand for limited supply: Inventories are near record lows while single-family starts are about two-thirds lower than their 2006 peak. Prices of existing homes, on the other hand, are still being constrained by foreclosure and short sales, in which the house sells for less than the amount owed the lender.

Also in the unusual column is household net worth, which hit a record $70.4 trillion in the first quarter as the value of financial assets came roaring back, according to the Federal Reserve’s Flow of Funds report.

“Record wealth, ample liquidity and very little leverage: It’s odd to have all three simultaneously,” said Joe Carson, the director of global economic research at AllianceBernstein LP.

Household debt shrank in the January-March period as it has for the better part of four years. Rising net worth usually goes hand in hand with an increase in leverage, but not this time.

Not that households had much choice. Even if they wanted to borrow, banks were atoning for their past excesses. Only recently have lending standards started to ease somewhat. The household debt-service ratio -- debt payments as a share of disposable personal income -- fell to a record low of 10.4 percent in the first quarter compared with a peak of 14 percent in the third quarter of 2007. You can thank low interest rates for some of that decline.

Before the crisis, home prices hadn’t declined on a national average basis since the Great Depression, which is one reason the Fed was so complacent about the brewing real-estate bubble.

’Rare’ Dollar

Then there’s inflation, or the lack of it. Inflation in the U.S. is slowing -- with and without food and energy prices -- four years after the trough. The Fed’s preferred inflation measure, the personal consumption expenditures price index, was up a scant 0.7 percent in the past 12 months. The core rate, which excludes volatile food and energy prices, rose 1.1 percent. Global inflation, as calculated by the International Monetary Fund, is slowing and stands at 2.9 percent even as central banks around the world have become more aggressive in their efforts to resuscitate ailing economies.

Finally, the strength of the U.S. dollar is “rare in a post-crisis setting,” which may say more about the problems in other developed countries, Reinhart said in an e-mail. “Crises are usually coupled with currency crashes in both advanced and emerging economies.”

The anomalies may be small at this point, too small to require an update to eight centuries of data on financial crises. With households on a stronger footing, inflation tame, the dollar behaving and record new-home prices beckoning builders for more, who knows? The differences may turn out to be more important to the outlook than the similarities.

(Caroline Baum, author of “Just What I Said,” is a Bloomberg View columnist.)

To contact the writer of this article: Caroline Baum in New York at cabaum@bloomberg.net

To contact the editor responsible for this article: James Greiff at jgreiff@bloomberg.net