This book is intended as a relatively nontechnica1 introduction to
eurrent demographie methods. It has been several years in preparation,
beginning from occasional class handouts I wrote to elaborate on
essential points of demographie methodology. Its growth from scattered
notes to an integrated text was a natural process, if a gradual one. The
eontent of the book addresses three objectives. first, I have tried to
avoid demographie methods that are now dated. In some ehapters, that has
meant eoncentrating on formulas most demographers recognize. In the
ehap- ters on life tables, it meant testing competing formulas on a
variety of real and synthetie data se.ts, and dropping or relegating to
footnotes those that were least accurate. Second, I have attempted to
give readers a sense of the limits of different formulas and methods. I
am a terse writer, however, and for the reader that means most sentences
carry weight. Chapters should be read attentively, with careful regard
to commentary as weIl as to formulas and examples. Finally, I have tried
to make the principal methodologies of the book accessible, by offering
explanations for formulas that are not obvious, by keeping examples to
the forefront, and by placing relatively specialized topics in ehapter
appendices.