1. Energy and our future

   • Virginia Abernethy

   Editorial Pages: 107 - 108

2. Limits to population size: Three scenarios of energy interaction between human society and ecosystem

   • Mario Giampietro
   • Sandra G. F. Bukkens
   • David Pimentel

   OriginalPaper Pages: 109 - 131

3. Socioeconomic determinants of China's urban fertility

   • Chaoze Cheng
   • Paul Maxim

   OriginalPaper Pages: 133 - 157

4. Immigration and free trade with Mexico: protecting American workers against double jeopardy

   • David E. Simcox

   OriginalPaper Pages: 159 - 175

5. Community size preference status, community satisfaction and migration intentions

   • William F. Stinner
   • Mollie Van Loon

   OriginalPaper Pages: 177 - 195

6. A special section for correspondence and controversy

   • Garrett Hardin

   Private Bag Pages: 197 - 200