time_units: generations
demes:
- name: deme1
  start_time: .inf
  epochs:
  - {end_size: 100, end_time: 0, start_size: 100}
- name: deme2
  start_time: .inf
  epochs:
  - {end_size: 100, end_time: 0, start_size: 100}
- name: deme3
  start_time: .inf
  epochs:
  - {end_size: 100, end_time: 0, start_size: 100}
migrations: []