The international luxury real estate market remains relatively immune to the economic and political trends that drive the general housing market and is off to strong start in 2013, according to a report from high-end real estate affiliate network Christie’s International Real Estate.

The report compared 10 top property markets around the world: London, New York, Hong Kong, Paris, San Francisco, France’s Cote d’Azur, Toronto, Dallas, Los Angeles, and Miami. The company, a subsidiary of Christie’s auction house, also rolled out a new index, the Christie’s International Real Estate Index, which ranks markets across metrics such as record sales price, prices per square foot, percentage of non-local and international purchasers, and the number of luxury listings relative to population.

The 10 markets were also chosen for the network’s strong market share locally. Christie’s International Real Estate has 125 affiliated brokerages in 41 countries.

London, which topped the index, achieved a record sales price of more than $121 million for a residential property in 2012, followed by an $88 million sale in New York. In all of the cities studied except Dallas and Toronto, the highest sales price for the year exceeded $35 million, the report said.

Economist Robert Shiller has predicted U.S. home prices will rise only one or two percent a year in inflation-adjusted terms for the next half decade due to “lingering uncertainties” in world economies, the report said. By contrast, a study by the The Boston Consulting Group expects global sales of personal luxury goods, such as fine art, to grow about 7 percent annually through 2014, assuming there are no new major economic crises, the report added.

“Except where there is government intervention luxury residential real estate values will likely follow luxury goods and not the general housing market, and are therefore poised to increase in many of the cities studied in 2013,”  the report said. “This is particularly true as (high-net-worth individuals) turn their luxury investments toward nonconsumables and experiential luxury products that have lasting value.”