Rachel Glennerster_____ runs the abdul latif jameel poverty action lab_ at the Massachusetts  institute of technology._ The research lab does development and poverty studies. Its goal is to improve the effectiveness of antipoverty programs in the United States and in other countries. Miss Glennerster_ tells us _that___ several studies by the research group`s economists__ have proven that small price changes have a big influence on the number of people who use a product_ . A price change will reduce the total amount of use of the product as well_ , she says. The economists_ have also found no evidence that the very act of paying for something changes how people use it_ . Finally, some development experts argue that pricing is useful when targeting a product among special populations. When it comes to bed nets, Miss Glennerster_ says research shows no evidence of this. People are just as likely to use a bed net if they paid for it or not.

If you give something to someone for free, will it let that person value it and use it? Development experts have debate this question for decades. Some say the act of paying causes this people to value something and use it more, others argue that selling necessary health treatment may deny them to the people who need them the most. Consider for example, chemically treated bad net,this bad nets kills mosquitoes and protect people against malaria while they are sleeping. New York University economist William Easterly says that this is one example of development gone round, in his recently book Professor Easterly  suggests that bad nets given freely in Africa are often used for the wrong purposes,  yet the world health organization recommends bad nets be given out freely and used by whole communities. The success of a large free bad net campaign in Kenya let the WHO to announce this recommendation last August The debate will likely influence social programs in the developing world. Many non governmental organizations support the creation of self-sustaining program in poor country. Goods and services are sold for apprise to help this programs survive.