| Article ID: | iaor1999342 |
| Country: | United Kingdom |
| Volume: | 34 |
| Issue: | 3 |
| Start Page Number: | 685 |
| End Page Number: | 697 |
| Publication Date: | Sep 1997 |
| Journal: | Journal of Applied Probability |
| Authors: | Renshaw Eric, Dai Yonglong |
A spatial process is considered in which two general birth–death processes are linked by migration of individuals. We examine conditions for weak symmetry and regularity, and develop necessary and sufficient conditions for recurrence. The results are easily extended to the