Do_et_al_summary_statistics
                        Summary statistics from Do et al. (2013)
budgetIV                Partially identify causal effects with invalid
                        instruments
budgetIV_scalar         Efficient partial identification of a scalar
                        causal effect parameter with invalid
                        instruments
simulated_data_budgetIV
                        Simulated summary statistics with invalid
                        instruments and nonlinear treatment effect
