How do I make my thesis statement more specific?

How to make a thesis statement?

• I made a thesis statement like "The price of gasoline has increased in America over the years. There are many factors to affect fluctuating gas prices and the gas prices have a major impact on our lives affecting the economy and our daily activities." when Im going to work with econ research paper. but my instructor said this is not really thesis. how to make it better? give me example. I am going to work my research paper with rising gas prices topic.

• Answer:

  You are making a general statement. A better way to tie it into household economics would to make the statement that, when wages and incomes for most people are stagnant or falling, the fluctuations in the price of gas are having serious impacts on family budgets.