alexseev                Example Data
cplot                   Conditional predicted value and average
                        marginal effect plots for models
dydx                    Marginal Effect of a Given Variable
image.lm                Perspective and heatmap/contour plots for
                        models
marginal_effects        Differentiate a Model Object with Respect to
                        All Variables
margins-package         Marginal Effects Estimation
plot.margins            Plot Marginal Effects Estimates
