幸福的计量模型
min∫0+∞[B-U(x)+V(l)]dt
s.t. dk/dt=f(l,c)-x
where, 
0 lower limit of integration
+∞ upper limit of integration
B maximum value of satisfaction of demand, conditioned on long-run technical level available to make use of measurable resources or endowment
U(x) utility achieved by spend monetary earning at amount of x
V(l) payment earned by means of providing labour services at amount of l by individual or group of people, and paid by employer or business activity
t time
k capital
x expenditure for consumption