Agequake: Riding the Demographic Rollercoaster Shaking Business, Finance and our World is a book written by Paul Wallace and published in 1999, that investigates the possible ramifications and implications as a significant and unprecedented portion of the human population ages.

[1] The book argues that increasing longevity and lower fertility is causing a seismic shift in the profile of populations worldwide, and will be a fundamental force that will severely affect business and finance, along with lifestyles and attitudes.

Through using dependency ratios (the ratio of non-working dependents to the working population) will lead to a point where workers will be burdened with the fiscal and practical responsibilities of supporting a ballooning population of retired elderly citizens.

Housing prices will plummet, and the world may experience the greatest bear market in history.

Internationally the relationship between the young and aggressive developing world and the wealthy older Organisation for Economic Co-operation and Development (OECD) countries (where elderly women will become an influential constituency) will change.