Consumers in this book refer to individuals and families. The term consumer can be defi ned in broad and narrow ways. Broadly, consumers are those who acquire and use natural, market, and other goods. Natural goods are air and natural resources that are not privately owned and priced. Market goods are priced products and services provided by commercial companies. Other goods refer to products and services provided by nonprofi t organizations. Narrowly, consumers are those who purchase and use market goods. In this book the narrow defi nition of consumer is used in most discussions. This introductory chapter fi rst discusses several defi nitions relevant to consumer economic wellbeing, such as wellbeing, subjective wellbeing, economic wellbeing, and consumer wellbeing. Then, the key term of this book, consumer economic wellbeing, is defi ned and introduced. The organization of the book is presented at the end of this chapter.