 HaPPINESS is a doll in a pushchair, a Big Mac and large fries and a loving circle of friends and family. The Office of National Statistics has identified a range of factors to assist in the complex calculation of national well-being.  The results of a five-month national debate, "What matters to you?" found that the British public believe their well-being should be measured in terms of health, friends and family and job satisfaction.  The research, which involved a survey of 34,000 people, will be used to help statisticians create the UK's first set of national well-being indicators. The new set of questions will allow the government to measure Britons' subjective quality of life and the figures will be published at regular intervals, perhaps alongside figures on gross domestic product (GDP).  as part of the research, which involved 175 public events involving 7,250 people, as well as an online questionnaire, the ONS discovered that happiness changed as people age. Children said what made them happy was eating breakfast, computer games, dolls and pushchairs, Christmas and birthdays.  For young adults the formula for contentment involved make-up, stylish clothes, music, fast food and alcohol. Older adults put more emphasis on jobs, health and financial securi 