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Real estate bubble

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Real estate bubble

A real estate bubble or property bubble (or housing bubble for residential markets) is a type of economic bubble that occurs periodically in local or global real estate markets, typically following a land boom. A land boom is the rapid increase in valuations of real property such as housing until they reach unsustainable levels and then decline in a bubble.

The questions of whether real estate bubbles can be identified and prevented, and whether they have broader macroeconomic significance are answered differently by schools of economic thought, as detailed below. The financial crisis of 2007–08 was related to the bursting of real estate bubbles which had begun during the 2000s around the world.[1][2]

Bubbles in housing markets are more critical than stock market bubbles. Historically, equity price busts occur on average every 13 years, lasts for 2.5 years, and result in about 4 percent loss in GDP. Housing price busts are less frequent, but last nearly twice as long and lead to output losses that are twice as large (IMF World Economic Outlook, 2003). A recent laboratory experimental study[3] also shows that, compared to financial markets, real estate markets involve longer boom and bust periods.


  • Identification and prevention 1
  • Macroeconomic significance 2
  • Recent real estate bubbles 3
    • 1990: Japan 3.1
    • 2007: many countries 3.2
  • Housing market indicators 4
    • Housing affordability measures 4.1
    • Housing debt measures 4.2
    • Housing ownership and rent measures 4.3
    • Housing price indices 4.4
  • Real estate bubbles in the 2000s 5
  • US real estate bubble 2012–present 6
  • See also 7
  • References 8
  • External links 9

Identification and prevention

US house price trend (1998–2008) as measured by the Case-Shiller index
Melbourne House Prices and Wages 1965 to 2010
Ratio of Melbourne median house prices to Australian annual wages, 1965 to 2010

As with all types of economic bubbles, whether or not a real estate bubble may be identified or predicted, then perhaps subsequently prevented, is contentious. Speculative bubbles may be defined as persistent, systematic and increasing deviations of actual prices from their fundamental values.[4] Bubbles can often be hard to identify, even after the event due to the difficulty in accurately estimating these fundamental or intrinsic values. In the real estate context, fundamentals can be estimated from rental yields (where real estate is then considered in a similar vein to stocks and other financial assets) or based on a regression of actual prices on a set of demand and/or supply variables.[5][6]

Within mainstream economics, it can be posed that real estate bubbles cannot be identified as they occur and cannot or should not be prevented, with government and central bank policy rather cleaning up after the bubble bursts.

American economist Robert Shiller of the Case-Shiller Home Price Index of home prices in 20 metro cities across the United States indicated on May 31, 2011 that a "Home Price Double Dip [is] Confirmed"[7] and British magazine The Economist, argue that housing market indicators can be used to identify real estate bubbles. Some argue further that governments and central banks can and should take action to prevent bubbles from forming, or to deflate existing bubbles.

Macroeconomic significance

Within mainstream economics, economic bubbles, and in particular real estate bubbles, are not considered major concerns. Within some schools of heterodox economics, by contrast, real estate bubbles are considered of critical importance and a fundamental cause of financial crises and ensuing economic crises.

The pre-dominating economic perspective is that economic bubbles result in a temporary boost in wealth and a redistribution of wealth. When prices increase, there is a positive wealth effect (property owners feel richer and spend more), and when they decline, there is a negative wealth effect (property owners feel poorer and spend less). These effects can be smoothed by counter-cyclical monetary and fiscal policies. The ultimate effect on owners who bought before the bubble formed and did not sell is zero. Those who bought when low and sold high profited, whereas those who bought high and sold low (after the bubble has burst) or held until the price fell lost money. This redistribution of wealth is of little macroeconomic significance.

In some schools of heterodox economics, notably Austrian economics and Post-Keynesian economics, real estate bubbles are seen as an example of credit bubbles (pejoratively, speculative bubbles), because property owners generally use borrowed money to purchase property, in the form of mortgages. These are then argued to cause financial and hence economic crises. This is first argued empirically – numerous real estate bubbles have been followed by economic slumps, and it is argued that there is a cause-effect relationship between these.

The Post-Keynesian theory of debt deflation takes a demand-side view, arguing that property owners not only feel richer but borrow to (i) consume against the increased value of their property – by taking out a home equity line of credit, for instance; or (ii) speculate by buying property with borrowed money in the expectation that it will rise in value. When the bubble bursts, the value of the property decreases but not the level of debt. The burden of repaying or defaulting on the loan depresses aggregate demand, it is argued, and constitutes the proximate cause of the subsequent economic slump.

Recent real estate bubbles

1990: Japan

The crash of the Japanese asset price bubble from 1990 on has been very damaging to the Japanese economy.[8] The crash in 2005 affected Shanghai, China's largest city.[9] In comparison to the stock market bubbles, real estate bubbles take longer to deflate: prices decline slower because the real estate market is less liquid. Commercial real estate generally moves in tandem with the residential properties, since both are affected by many of same factors e.g., (interest rates) and share the "wealth effect" of booms. Therefore, this article focuses on housing bubbles and mentions other sectors only when their situation differs.

2007: many countries

As of 2007, real estate bubbles had existed in the recent past or were widely believed to still exist in many parts of the world,[10] especially in Austria, the United States, Malta, Argentina,[11] Britain, Jamaica, Micronesia, Ethiopia, Netherlands, Italy, Equatorial Guinea, Monaco, Turkey, Faroe Islands, Brazil, Denmark, Philippines, Fiji, Dominica, Iceland, Nauru, Greenland, Liechtenstein, Canada, Germany, Portugal, New Zealand, Zaire, Latvia, Ireland, Spain, Sri Lanka, Guinea-Bissau, Indonesia, Lebanon, Japan, Bahrain, Iraq, Iran, Timor-Leste, France, Afghanistan, Luxembourg, Bangladesh, Tuvalu, Andorra, Azerbaijan, Jordan, Oman, Venezuela, Mexico, Gibraltar, Poland,[12] South Africa, Turkmenistan, Israel, Greece, Outer Mongolia, Mozambique, Bahamas, Mali, El Salvador, Botswana, Algeria, Laos, Yemen, Bulgaria, Norway, Singapore, South Korea, North Korea, Baltic States, Thailand, Swaziland, India, Hong Kong, Romania, Zimbabwe, Vatican City, Ukraine, China and Croatia.[13] Then U.S. Federal Reserve Chairman Alan Greenspan said in mid-2005 that "at a minimum, there's a little 'froth' (in the U.S. housing market) … it's hard not to see that there are a lot of local bubbles."[14] The Economist magazine, writing at the same time, went further, saying "the worldwide rise in house prices is the biggest bubble in history".[15] Real estate bubbles are invariably followed by severe price decreases (also known as a house price crash) that can result in many owners holding mortgages that exceed the value of their homes. 11.1 million residential properties, or 23.1% of all U.S. homes, were in negative equity at Dec. 31, 2010.[16] Commercial property values remained around 35% below their mid-2007 peak in the United Kingdom.[17] As a result, banks have become less willing to hold large amounts of property backed debt, likely a key issue affecting the worldwide recovery in the short term.

Housing market indicators

UK house prices between 1975 and 2006 adjusted for inflation.
Robert Shiller's plot of U.S. home prices, population, building costs, and bond yields, from Irrational Exuberance, 2d ed. Shiller shows that inflation adjusted U.S. home prices increased 0.4% per year from 1890–2004, and 0.7% per year from 1940–2004, whereas U.S. census data from 1940–2004 shows that the self-assessed value increased 2% per year.

In attempting to identify bubbles before they burst, economists have developed a number of financial ratios and economic indicators that can be used to evaluate whether homes in a given area are fairly valued. By comparing current levels to previous levels that have proven unsustainable in the past (i.e. led to or at least accompanied crashes), one can make an educated guess as to whether a given real estate market is experiencing a bubble. Indicators describe two interwoven aspects of housing bubble: a valuation component and a debt (or leverage) component. The valuation component measures how expensive houses are relative to what most people can afford, and the debt component measures how indebted households become in buying them for home or profit (and also how much exposure the banks accumulate by lending for them). A basic summary of the progress of housing indicators for U.S. cities is provided by Business Week.[18] See also: real estate economics and real estate trends.

Housing affordability measures

  • The price to income ratio is the basic affordability measure for housing in a given area. It is generally the ratio of median house prices to median familial disposable incomes, expressed as a percentage or as years of income. It is sometimes compiled separately for first time buyers and termed attainability. This ratio, applied to individuals, is a basic component of mortgage lending decisions. According to a back-of-the-envelope calculation by Goldman Sachs, a comparison of median home prices to median household income suggests that U.S. housing in 2005 is overvalued by 10%. "However, this estimate is based on an average mortgage rate of about 6%, and we expect rates to rise," the firm's economics team wrote in a recent report.[19] According to Goldman's figures, a one-percentage-point rise in mortgage rates would reduce the fair value of home prices by 8%.
  • The deposit to income ratio is the minimum required downpayment for a typical mortgage , expressed in months or years of income. It is especially important for first-time buyers without existing home equity; if the downpayment becomes too high then those buyers may find themselves "priced out" of the market. For example, as of 2004 this ratio was equal to one year of income in the UK.[20]
    Another variant is what the United States's National Association of Realtors calls the "housing affordability index" in its publications.[21] (The soundness of the NAR's methodology was questioned by some analysts as it does not account for inflation.[22] Other analysts, however, consider the measure appropriate, because both the income and housing cost data is expressed in terms that include inflation and, all things being equal, the index implicitly includes inflation). In either case, the usefulness of this ratio in identifying a bubble is debatable; while downpayments normally increase with house valuations, bank lending becomes increasingly lax during a bubble and mortgages are offered to borrowers who would not normally qualify for them (see Housing debt measures, below).
  • The Affordability Index measures the ratio of the actual monthly cost of the mortgage to take-home income. It is used more in the United Kingdom where nearly all mortgages are variable and pegged to bank lending rates. It offers a much more realistic measure of the ability of households to afford housing than the crude price to income ratio. However it is more difficult to calculate, and hence the price to income ratio is still more commonly used by pundits. In recent years, lending practices have relaxed, allowing greater multiples of income to be borrowed. Some speculate that this practice in the longterm cannot be sustained and may ultimately lead to unaffordable mortgage payments, and repossession for many.
  • The Median Multiple measures the ratio of the median house price to the median annual household income. This measure has historically hovered around a value of 3.0 or less, but in recent years has risen dramatically, especially in markets with severe public policy constraints on land and development.[23]
Inflation-adjusted home prices in Japan (1980–2005) compared to home price appreciation in the United States, Britain, and Australia (1995–2005).

Housing debt measures

  • The housing debt to income ratio or debt-service ratio is the ratio of mortgage payments to disposable income. When the ratio gets too high, households become increasingly dependent on rising property values to service their debt. A variant of this indicator measures total home ownership costs, including mortgage payments, utilities and property taxes, as a percentage of a typical household's monthly pre-tax income; for example see RBC Economics' reports for the Canadian markets.[24]
  • The housing debt to equity ratio (not to be confused with the corporate debt to equity ratio), also called loan to value, is the ratio of the mortgage debt to the value of the underlying property; it measures financial leverage. This ratio increases when the homeowner takes a second mortgage or home equity loan using the accumulated equity as collateral. A ratio greater higher than 1 implies that owner's equity is negative.

Housing ownership and rent measures

  • Bubbles can be determined when an increase in housing prices is higher than the rise in rents. In the US, rent between 1984 and 2013 has risen steadily at about 3% per year, whereas between 1997 and 2002 housing prices rose 6% per year. Between 2011 and the third-quarter of 2013 housing prices rose 5.83% and rent increased 2%.[25]
  • The ownership ratio is the proportion of households who own their homes as opposed to renting. It tends to rise steadily with incomes. Also, governments often enact measures such as tax cuts or subsidized financing to encourage and facilitate home ownership. If a rise in ownership is not supported by a rise in incomes, it can mean either that buyers are taking advantage of low interest rates (which must eventually rise again as the economy heats up) or that home loans are awarded more liberally, to borrowers with poor credit. Therefore, a high ownership ratio combined with an increased rate of subprime lending may signal higher debt levels associated with bubbles.
  • The price-to-earnings ratio or P/E ratio is the common metric used to assess the relative valuation of equities. To compute the P/E ratio for the case of a rented house, divide the price of the house by its potential earnings or net income, which is the market annual rent of the house minus expenses, which include maintenance and property taxes. This formula is:
\mbox{House P/E ratio} = \frac{\mbox{House price}}{\mbox{Rent} - \mbox{Expenses}}
The house price-to-earnings ratio provides a direct comparison with P/E ratios utilised to analyze other uses of the money tied up in a home. Compare this ratio to the simpler but less accurate price-rent ratio below.
  • The price-rent ratio is the average cost of ownership divided by the received rent income (if buying to let) or the estimated rent (if buying to reside):
\mbox{House Price-Rent ratio} = \frac{\mbox{House price}}{\mbox{Monthly Rent} \times 12}
The latter is often measured using the "owner's equivalent rent" numbers published by the Bureau of Labor Statistics. It can be viewed as the real estate equivalent of stocks' price-earnings ratio; in other terms it measures how much the buyer is paying for each dollar of received rent income (or dollar saved from rent spending). Rents, just like corporate and personal incomes, are generally tied very closely to supply and demand fundamentals; one rarely sees an unsustainable "rent bubble" (or "income bubble" for that matter). Therefore a rapid increase of home prices combined with a flat renting market can signal the onset of a bubble. The U.S. price-rent ratio was 18% higher than its long-run average as of October 2004.[26]
  • The gross rental yield, a measure used in the United Kingdom, is the total yearly gross rent divided by the house price and expressed as a percentage:
\mbox{Gross Rental Yield} = \frac{\mbox{Monthly Rent} \times 12}{\mbox{House Price}} \times 100\%
This is the reciprocal of the house price-rent ratio. The net rental yield deducts the landlord's expenses (and sometimes estimated rental voids) from the gross rent before doing the above calculation; this is the reciprocal of the house P/E ratio.
Because rents are received throughout the year rather than at its end, both the gross and net rental yields calculated by the above are somewhat less than the true rental yields obtained when taking into account the monthly nature of rental payments.
  • The occupancy rate (opposite: vacancy rate) is the amount of occupied housing units divided by the total amount of units in a given region (in commercial real estate, it is usually expressed in terms of area (i.e. in square metres, acres, et cetera) for different grades of buildings). A low occupancy rate means that the market is in a state of oversupply brought about by speculative construction and purchase. In this context, supply-and-demand numbers can be misleading: sales demand exceeds supply, but rent demand does not.

Housing price indices

The Case–Shiller index (national, quarterly) 1987–2008, showing a housing bubble peaking in 2006.

Measures of house price are also used in identifying housing bubbles; these are known as house price indices (HPIs).

A noted series of HPIs for the United States are the Case–Shiller indices, devised by American economists Karl Case, Robert J. Shiller, and Allan Weiss. As measured by the Case–Shiller index, the US experienced a housing bubble peaking in the second quarter of 2006 (2006 Q2).

Real estate bubbles in the 2000s

By 2006, most areas of the world were thought to be in a bubble state, although this hypothesis, based upon the observation of similar patterns in real estate markets of a wide variety of countries,[27] was subject to controversy. Such patterns include those of overvaluation and, by extension, excessive borrowing based on those overvaluations.

The subprime mortgage crisis, alongside its impacts and effects on economies in various nations, has implied that these trends might have some common characteristics.[10]

For individual countries, see:

US real estate bubble 2012–present

The Washington Post writer Lisa Sturtevant thinks that the housing market of 2013 was not indicative of a housing bubble. "A critical difference between the current market and the overheated market of the middle of last decade is the nature of the mortgage market. Stricter underwriting standards have limited the pool of potential homebuyers to those who are most qualified and most likely to be able to pay loans back. The demand this time is based more closely on market fundamentals. And the price growth we’ve experienced recently is 'real.' Or 'more real.'"[29] Other recent research indicates that mid-level managers in securitized finance did not exhibit awareness of problems in overall housing markets.[30]

Economist David Stockman believes that a second housing bubble was started in 2012 and still inflating as of February 2013.[31] Housing inventory began to dwindle starting in early 2012 as hedge fund investors and private equity firms purchase single family homes in hopes of renting them out while waiting for a housing rebound.[32] Due to the policies of QE3, mortgage interest rates have been hovering at an all-time low, causing real estate values to rise. Home prices have risen unnaturally as much as 25% within one year in metropolitan areas like the San Francisco Bay Area and Las Vegas.[33]

See also


  1. ^ Michael Simkovic, "Competition and Crisis in Mortgage Securitization"
  2. ^ Klein, Ezra (2009-05-28). "Bill Clinton and the Housing Bubble". Washington Post. Retrieved 2011-09-22. 
  3. ^ Ikromov, Nuridding and Abdullah Yavas, 2012a, Asset Characteristics and Boom and Bust Periods: An Experimental Study, Real Estate Economics, 40, 508–535.
  4. ^  
  5. ^ Nneji, Ogonna;  
  6. ^ Nneji, Ogonna;  
  7. ^ Christie, Les (May 31, 2011). "Home prices: 'Double-dip' confirmed". CNN Money. 
  8. ^ Fackler, Martin (December 25, 2005). "Take It From Japan: Bubbles Hurt". New York Times. Retrieved 2009-06-23. 
  9. ^ Lee, Don (January 8, 2006). "A Home Boom Busts". Los Angeles Times. Retrieved 2009-06-23. 
  10. ^ a b Putland, Gavin R. (June 1, 2009). "From the subprime to the terrigenous: Recession begins at home". Land Values Research Group. Retrieved 2009-06-23. 
  11. ^ "The good times are here again". Global Property Guide. February 28, 2008. Retrieved 2009-06-23. 
  12. ^ "The end of Poland’s house price boom". Global Property Guide. August 25, 2008. Retrieved 2009-06-23. 
  13. ^ "Real estate prices in Adriatic Coast up, Zagreb down". Global Property Guide. August 19, 2008. Retrieved 2009-06-23. 
  14. ^  
  15. ^ "The global housing boom". The Economist. June 16, 2005. 
  16. ^ Philyaw, Jason. "Underwater mortgages back above 11 million in 4Q". CoreLogic. Retrieved 2014-04-14. 
  17. ^ PropertyMall
  18. ^ "Interactive Table: How Bubbly Is Your Housing Market?". Business Week. April 11, 2005. Archived from the original on Nov 20, 2007. Retrieved 2009-06-23. 
  19. ^ [1]
  20. ^ Nottingham Trent University [2]
  21. ^ "Affordable Housing Real Estate Resource: Housing Affordability Index". National Association of Realtors. Retrieved 2009-06-23. 
  22. ^ [3]
  23. ^ 10th Annual Demographia International Housing Affordability Survey: 2014 access date 11-Nov-2014
  24. ^ June 2, 2005 report
  25. ^ Wallison, Peter J (January 5, 2014), The Bubble is Back, New York: The New York Times, p. A15, retrieved 2014-04-14 
  26. ^ Krainer, John; Wei, Chishen (October 1, 2004). "House Prices and Fundamental Value".  
  27. ^ "House Prices Worldwide". Global Property Guide. Retrieved 2009-06-23. 
  28. ^ Bajaj, Vikas; Leonhardt, David (2008-12-18). "Tax Break May Have Helped Cause Housing Bubble". New York Times. Retrieved 2012-05-06. 
  29. ^ Sturtevant, Lisa A. (March 26, 2013). "Is the Washington, D.C.-area housing market bubbling again?". The Washington Post. 
  30. ^ , Princeton University, September 2013Wall Street and the Housing Bubble
  31. ^
  32. ^
  33. ^

External links


  • The Economist, December 8, 2005, "Hear that hissing sound?."
  • The Economist, June 16, 2005, "After the fall."
  • The Economist, June 16, 2005, "In come the waves."
  • The Economist, April 20, 2005, "Will the walls come falling down?"
  • The Economist, May 3d, 2005, "Still want to buy?"
  • The Economist, May 29, 2003, "House of cards."
  • The Conveyancers, May 29, 2007, "Conveyancing Adelaide."
  • The Economist, May 28, 2002, "Going through the roof."
  • Gjerstad, Steven;  
  • The New York Times, December 25, 2005, Take It From Japan: Bubbles Hurt.
  • Robert Kiyosaki (2005). All Booms Bust
  • Benjamin Wallace-Wells, "There goes the neighborhood", Washington Monthly, 2004 April.
  • Emile Phaneuf (January 4, 2011). "Rio Real Estate Shielded From Burst".  
  • Fred Foldvary (1997). The Business Cycle: A Georgist-Austrian Synthesis. American Journal of Economics and Sociology 56 (4) (October 1997): 521–41.
  • USA, Ireland, UK, Spain and Japan Property Bubbles versus Australia.
  • California’s Real Estate Bubble by Fred E. Foldvary, covers the California, U.S., and global bubble from a libertarian perspective.
  • Where should house prices really be and how did they get so high?, June 7, 2008, Bergen County, New Jersey Foreclosures blog : Analysis of how the US Real Estate Bubble developed and historical house price to income ratios
  • Jose Francisco Bellod Redondo, University of Malaga, Detection of real estate bubbles: the Spanish case : performance of Spanish housing market between 1989 and 2009 (in spanish), May 2011
  • Steimetz, Seiji S. C. (2008). "Bubbles". In  


  • Dean Baker, Financial Bubbles (Stocks and Housing) and How You Can Protect Yourself Against Them, Center for Economic and Policy Research Economics Seminar Series, November 10, 2005
  • Is the Housing Bubble Collapsing? 10 Indicators to Watch PDF (153 KiB) Report by Dean Baker, June 2006
  • The Global House Price Boom PDF (367 KiB), World Economic Outlook, International Monetary Fund, September 2004.
  • When Bubbles Burst PDF (354 KiB), World Economic Outlook, International Monetary Fund, April 2003.
  • Wendell Cox consulting, 8th Annual Demographia International Housing Affordability Survey, 2010, covers 325 metropolitan markets in Australia, Canada, Hong Kong, Ireland, New Zealand, the United Kingdom and the United States.
  • Are housing prices, household debt, and growth sustainable? PDF (342 KiB), Levy Economics Institute of Bard College, January 2006.
  • Spanish Property Market Summary (Data Included from 1985 to 2010) PDF (459 KiB), July 2010
  • Vancouver : House Prices 1975 - 2012, UBC Centre for Urban Economics and Real Estate, calculation of Royal LePage Survey


  • John Calverley (2004), Bubbles and how to survive them, N. Brealey. ISBN 1-85788-348-9
  • Robert J. Shiller (2005). Irrational Exuberance, 2d ed. Princeton University Press. ISBN 0-691-12335-7.
  • John R. Talbott (2003). The Coming Crash in the Housing Market, New York: McGraw-Hill, Inc. ISBN 0-07-142220-X.
  • Andrew Tobias (2005). The Only Investment Guide You'll Ever Need (updated ed.), Harcourt Brace and Company. ISBN 0-15-602963-4.
  • Eric Tyson (2003). Personal Finance for Dummies, 4th ed., Foster City, CA: IDG Books. ISBN 0-7645-2590-5.
  • Burton G. Malkiel (2003). The Random Walk Guide to Investing: Ten Rules for Financial Success, New York: W. W. Norton and Company, Inc. ISBN 0-393-05854-9.
  • Elizabeth Warren and Amelia Warren Tyagi (2003). The Two-Income Trap: Why Middle Class Mothers and Fathers are Going Broke, New York: Basic Books. ISBN 0-465-09082-6.
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