| pgt::comparing-axioms | Comparing axiom systems | HTML | source | R code | |
| pgt::introduction | Introduction to pgt | HTML | source | R code | |
| pgt::models | The estimating programmes | HTML | source | ||
| pgt::multiple-pollutants | Multiple pollutants and heterogeneous coefficients | HTML | source | R code | |
| pgt::productivity | Productivity change and inference | HTML | source | R code | |
| pgt::replication | Replicating published results | HTML | source | R code |