NOTES: THERE IS NO GUARANTEE THAT THOSE CODES ARE FREE FROM
BUGS. Please do let us know in case you have discovered any
errors. THANK YOU!

MQE.r: a simple R code for both MQE and LSE for beta

MQEpart.r: lasso MQE by matching the quantiles between alpha0 and alpha1

MQElasso.r: MQE and LSE with or w/o LASSO for beta, with the L1 norm of the
            estimators equal to a*|ordinary LSE or MQE|

MQElp.r: in addition to MQElasso.r, it also calculates lasso MQE by
           matching the quantiles between alpha0 and alpha1


