BUNCHING: Stata module to use bunching to partially and point identify the elasticity of income with respect to tax rates

bunching uses a mass point (bunching) in a distribution of reported income to partially and point identify the elasticity of income with respect to tax rate. The marginal income tax rate changes discontinuously at the mass point (i.e. kink point in the budget set). This is a master function that combines bunchbounds for partial identification with bunchtobit for point identification. If desired, bunching also calls bunchfilter to filter out friction error of the data.