Not sure if any of you caught this amazing Article from The Economist Entitled:

"More BANG for your Buck" How Technology is Shaping Up the World's Oldest Business  

http://www.economist.com/news/briefing/21611074-how-new-technology-shaking-up-oldest-business-more-bang-your-buck  

But it is worth a read.... Just an excerpt-  

 
We have analysed 190,000 profiles of sex workers on an international review site. (Since it is active in America, it was not willing to be identified for this article. A disclaimer on the site says the contents are fictional; we make the assumption that they are informative all the same.) Each profile includes customers’ reviews of the worker’s physical characteristics, the services they offer and the price they charge.

The data go back as far as 1999. For each individual we have used the most recent information available, with prices corrected for inflation. Some of those featured may appear under more than one name, or also work through agencies. The data cover 84 cities in 12 countries, with the biggest number of workers being in America and most of the rest in big cities in other rich countries. As this site features only women, our analysis excludes male prostitutes (perhaps a fifth of the commercial-sex workforce). Almost all of those leaving reviews are men.

The most striking trend our analysis reveals is a drop in the average hourly rate of a prostitute in recent years (see chart 1). One reason is surely the downturn that followed the 2007-08 financial crisis. Even prostitutes working in places that escaped the worst effects have been hit. Vanessa, a part-time escort in southern England, finds that weeks can go by without her phone ringing. Men see buying sex as a luxury, she says, and with the price of necessities rising it is one they are cutting back on. Even when she offers discounts to whip up interest, clients are scarcer than they were. In places where the job market slumped, the effect is more marked (whether prostitution is legal may affect prices, too, but the wide variation between American cities shows that this is not the only factor). The cost of an hour with an escort in Cleveland, Ohio, where unemployment peaked at 12.5% in 2010, has tumbled.

The rest of the article is linked above and is full of charts like the one below!  

Along similar lines here is another great article-

http://www.economist.com/news/leaders/21611063-internet-making-buying-and-selling-sex-easier-and-safer-governments-should-sto