Watch and learn! Over sixty author videos provide definitions, tips, and examples surrounding the key topics of each chapter.
Test yourself! Answers to the in-text problem sets will help you check your work and identify
areas where you might need more practice. Download the data for the problem questions here.
This website may contain links to both internal and external websites. All links included were active at the time the website was launched. SAGE does not operate these external websites and does not necessarily endorse the views expressed within them. SAGE cannot take responsibility for the changing content or nature of linked sites, as these sites are outside of our control and subject to change without our knowledge. If you do find an inactive link to an external website, please try to locate that website by using a search engine. SAGE will endeavour to update inactive or broken links when possible.