| becomes_ta | Calculate inclusion probabilities | 
| expected_coverage | Expected coverage | 
| inclusion_prob | Calculate inclusion probabilities | 
| order_sampling | Stratified sequential Poisson sampling | 
| prop_allocation | Construct a proportional allocation | 
| ps | Stratified sequential Poisson sampling | 
| sps | Stratified sequential Poisson sampling | 
| sps_repweights | Bootstrap replicate weights for sequential Poisson sampling |