BTdataframe             Dataframe initialization
BTdecay                 Bradley-Terry Model with Exponential Decayed
                        weighted likelihood
BTdecayLasso            Bradley-Terry Model with Exponential Decayed
                        weighted likelihood and Adaptive Lasso
BTdecayLassoC           Bradley-Terry Model with Exponential Decayed
                        weighted likelihood and weighted Lasso with AIC
                        or BIC criteria
BTdecayLassoF           Bradley-Terry Model with Exponential Decayed
                        weighted likelihood and Adaptive Lasso with a
                        given penalty rate
NFL2010                 The 2010 NFL Regular Season
boot.BTdecayLasso       Compute the standard deviation of Bradley-Terry
                        decay Lasso model by bootstrapping
plot.swlasso            Plot the Lasso path
plot.wlasso             Plot the Lasso path
