In Part III of the book, I turn to the economic analysis of artists and treat them and other creators of works of art as workers. Chapter 11 presents the theory of the supply and demand for artists in the labour market and looks at what determines incomes and employment. In studying artists' labour markets, cultural economists have used the theories of labour economics, the branch of economics that investigates topics such as the working of labour markets, employment and unemployment, rates of pay, training and education, and the effects on the labour market of institutional regulations, such as a minimum wage. Chapter 11 also looks at the question of artistic motivation and what influences creativity. Chapter 12 describes empirical research on artists' labour markets by cultural economists, showing that labour economics has to be adapted to apply to artists. Chapter 13, on the economics of copyright, goes into copyright law as an economic incentive to artists and other creators to create works of art and investigates copyright as a source of income for artists. Together, these three chapters show the key role of artists in the creative industries; the chief input of the creative industries is the creation of novel content, without which there would be no reason to distinguish these industries, and artists are the source of content creation.