what package is used by smooth transition regressions what package can be used to specify smooth transition regression models what package is used to specify smooth transition regression model what is smooth transition what is smooth transition can smooth transition regression model be used with r? what is smooth transition modeling r what is smooth transition model in r what r packages are available for smooth transition model? why use r package for smooth transition regression can r use smooth transition regression what is smooth transition regression smooth transition regression model which package can be used to specify smooth transition regression? what packages are needed to specify smooth transition regression? what is smooth transition regression model which r regression package allows smooth transitions can smooth transition regression be a smooth transition model r package for smooth transition regression what is smooth transition regression in r