demo_returns            Asset returns used in Ang, Chen and Xing (RFS,
                        2006), sorted into ten portfolios.
monoBonferroni          Test of weak monotonicity using Bonferroni
                        bounds
monoRelation            Testing the monotonic relationship in asset
                        returns
monoSummary             Summary of Patton and Timmermann monotonicity
                        (JoE, 2010) tests
monoUpDown              Up and Down test
statBootstrap           Stationary bootstrap method
wolak                   Testing inequality constraints in linear
                        econometric models
