Illustrating Karesh Kuhn Tucker with two non-nonnegativy constraints binding
Only two or three papers spontaneously come to my mind, they are not very recent (but quite seminal papers, useful to find further newest contributions):
Lee, Lung-Fei, and Mark M. Pitt, 1986, &quot;Microeconometric Demand System with Binding Nonnegativity Constraints: The Dual Approach,&quot; Econometrica, 54, 1237–1242.
Lee, Lung-Fei and Mark M. Pitt, 1987, &quot;Microeconometric models of rationing, imperfect markets, and non-negativity constraints,&quot; Journal of Econometrics, 36, 89-110.
Here is a more recent contribution:
Golan, Amos, et al. “Estimating a Demand System with Nonnegativity Constraints: Mexican Meat Demand,” The Review of Economics and Statistics, vol. 83, no. 3, 2001, pp. 541–550.