“…At this point, it might be instructive to point out that the term "monotone methods" may be taken in its broadest sense as encompassing the theory of supermodular optimization and games, among other aspects. However, the most frequent use of this phrase actually occurs in the study of economic dynamics and refers more specifically to the use of lattice programming techniques, along with versions of the Tarski-Kantorovich-Katsner fixed-point theorem (Tarski 1955), and of the study of a self-map on consumption functions constructed directly from Euler equations in economic dynamics (as in Lucas and Stokey 1987;Coleman 1991;Datta et al 2018; Barbie and Hillebrand 2018, among others). To deal with the uniqueness issue, the study of this mapping also sometimes involves another lesser-known fixed-point argument for concave maps due to Krasnosel'skii and Zabreiko (1984).…”