genGammaSplinesTT

data.frame, the distribution of the data.

distr

function, the S-function corresponding to a
particular IV-like estimand.

weight

vector, string names of the covariates, other than the
intercept and treatment variable.

zvars

matrix, the spline basis for the treated group ("u1")
corresponding to the first (and only) spline specification
("s1").

u1s1

matrix, the spline basis for the control group ("u0")
corresponding to the first spline specification ("s1").

u0s1

matrix, the spline basis for the control group ("u0")
corresponding to the second spline specification ("s2").

u0s2

boolean, set to <code>TRUE</code> if the gamma moment being
generated corresponds to the target parameter.

target

all other arguments that enter into <code>weight</code>,
excluding the argument <code>d</code> for treatment indicator.

This function generates the Gamma moments for a given set of
weights. This funciton is written specifically for tests.

The marginal treatment effect was introduced by Heckman and
Vytlacil (2005) <doi:10.1111/j.1468-0262.2005.00594.x> to provide a
choice-theoretic interpretation to instrumental variables models that
maintain the monotonicity condition of Imbens and Angrist (1994)
<doi:10.2307/2951620>. This interpretation can be used to extrapolate from
the compliers to estimate treatment effects for other subpopulations. This
package provides a flexible set of methods for conducting this
extrapolation. It allows for parametric or nonparametric sieve estimation,
and allows the user to maintain shape restrictions such as monotonicity. The
package operates in the general framework developed by Mogstad, Santos and
Torgovitsky (2018) <doi:10.3982/ECTA15463>, and accommodates either point
identification or partial identification (bounds). In the partially
identified case, bounds are computed using linear programming. Support for
three linear programming solvers is provided. Gurobi and the Gurobi R API
can be obtained from <http://www.gurobi.com/index>. CPLEX can be obtained
from <https://www.ibm.com/analytics/cplex-optimizer>. CPLEX R APIs 'Rcplex'
and 'cplexAPI' are available from CRAN. The lp_solve library is freely
available from <http://lpsolve.sourceforge.net/5.5/>, and is included when
installing either of its R APIs, 'lpSolve' or 'lpSolveAPI', which are
available from CRAN.

genGammaSplinesTT: Generating the Gamma moments for splines, for 'testthat'

Description

Usage

Arguments

Value