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According to ISTAT, retail sales in July 2009 decreased by 2.6% over the same month last year. The decrease was 0.4% compared to June 2009. Istat states that the decrease is the result of a decrease of 2.1% of food sales and 2.8% of those assets non-food. In terms of trend is the sixth consecutive drop. This
the news, but it will certainly be more than one asked how this data is collected, there will be those who expect that the people will bear with retailers to ask what they sold, then there will be those who expect to be interviewed families.
in reality the companies interviewed, that's what happens:
The survey of retail sales survey conducted monthly by Istat on a sample of commercial enterprises that use, for distribution of their products, shopping such as butchers, a supermarket and the fruit that we all find the house. The investigation included the resale of motor vehicles and fuels (dealerships and service stations) and workshops or shops that carry out repairs.
Businesses surveyed are asked

• that was the value of sales by product sold, and how these have been sold, hypermarkets, supermarkets, discount grocery stores or other;
  
• if compared to the corresponding month last year the sale was more or less;
• total number of outlets open to the public
• number of opening days in the month;
• total area of \u200b\u200bretail outlets;
• number of persons employed