O'Reilly logo

On Borrowed Time by John E. Tilton

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 3

Imperfect Measures

There are many ways to measure resource availability. Although none are perfect, some are better than others. This chapter first considers measures that are entirely or largely physical in nature. These measures are frequently encountered in the literature and have considerable intuitive appeal. It then reviews measures that are economic in nature. Although all the economic measures have shortcomings, we will see that they are more useful than physical measures for assessing the long-run threat from mineral depletion. In Chapter 4, as a result, we will rely on economic measures to identify the historical trends in mineral commodity availability.

Physical Measures

The logic behind physical measures is both simple ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required