Countries measure the mood of their consumers by surveying consumer attitudes regarding present economic conditions each month. Consumer spending usually makes up two-thirds of GDP in a developed economy, and therefore is important to monitor. Consumer confidence also affects stock and bond markets, and can give insight into consumers reactions to any economic shocks. The general method in scoring the confidence level is through household surveys conducted monthly. Some use preliminary estimates which surveys fewer households at the beginning of the month, and a final survey that encompasses a larger sample pool towards the end of the month.