\(\alpha\):
Fraction of roll-over allowed
\(\gamma\):
Concavity of inventories accumulation
\(\beta\):
Present bias discount factor
\(\delta\):
Monthly discount factor
\(A\):
Shifter of year-end reward function
\(\rho\):
Concavity of year-end reward function
\(c\):
Marginal cost of expenditure
\(\overline{B}\):
Total budget
