Average Price=
	Share 1*Price 1+(1-Share 1)*Price 2
	~	$/GJ
	~		|

Base Demand=
	1
	~	GJ/Year
	~		|

Cumulative Production 1= INTEG (
	Production 1,
		0)
	~	GJ
	~		|

Cumulative Production 2= INTEG (
	Production 2,
		0)
	~	GJ
	~		|

Demand Elasticity=
	-1
	~	dmnl
	~		|

Demand Growth Rate=
	0.03
	~	1/Year
	~		|

Distribution Cost=
	1
	~	$/GJ
	~		|

Noise 1=
	EXP(RANDOM NORMAL(-6,6,0,0.05,seed))
	~	dmnl
	~		|

Noise 2=
	EXP(RANDOM NORMAL(-6,6,0,0.05,seed))
	~	dmnl
	~		|

Price 1=
	Reference Price/(1+LN(1+Cumulative Production 1/Reference Production))
	~	$/GJ
	~		|

Price 2=
	Reference Price/(1+LN(1+Cumulative Production 2/Reference Production))
	~	$/GJ
	~		|

Production 1=
	Total Demand*Share 1*Noise 1
	~	GJ/Year
	~		|

Production 2=
	Total Demand*(1-Share 1)*Noise 2
	~	GJ/Year
	~		|

Reference Demand=
	Base Demand*EXP(Demand Growth Rate*(Time-INITIAL TIME))
	~	GJ/Year
	~		|

Reference Price=
	1
	~	$/GJ
	~		|

Reference Production=
	5
	~	GJ
	~		|

seed=
	1237
	~	dmnl
	~	Seed for random number generator.
	|

Share 1=
	1/(1+(Price 1/Price 2)^Substitution Elasticity)
	~	dmnl
	~		|

Substitution Elasticity=
	6
	~	dmnl
	~		|

Total Demand=
	Reference Demand
	*((Average Price+Distribution Cost)/(Reference Price+Distribution Cost))
	^Demand Elasticity
	~	GJ/Year
	~		|

********************************************************
	.Control
********************************************************~
		Simulation Control Paramaters
	|

FINAL TIME  = 100
	~	Year
	~	The final time for the simulation.
	|

INITIAL TIME  = 0
	~	Year
	~	The initial time for the simulation.
	|

SAVEPER  = 
        TIME STEP
	~	Year
	~	The frequency with which output is stored.
	|

TIME STEP  = 0.125
	~	Year
	~	The time step for the simulation.
	|

\\\---/// Sketch information - do not modify anything except names
V300  Do not put anything below this section - it will be ignored
*View 1
$0,0,Times New Roman|12||0-0-0|0-0-0|0-0-0|-1--1--1|-1--1--1
10,1,Cumulative Production 1,470,150,40,20,3,3,0,0,0,0,0,0
10,2,Cumulative Production 2,470,360,40,20,3,3,0,0,0,0,0,0
12,3,48,250,150,8,8,0,3,0,0,-1,0,0,0
1,4,6,1,4,0,0,22,0,0,0,-1--1--1,,1|(388,150)|
1,5,6,3,100,0,0,22,0,0,0,-1--1--1,,1|(296,150)|
11,6,48,340,150,6,8,34,3,0,0,1,0,0,0
10,7,Production 1,340,169,41,11,32,3,0,0,-1,0,0,0
12,8,48,244,361,8,8,0,3,0,0,-1,0,0,0
1,9,11,2,4,0,0,22,0,0,0,-1--1--1,,1|(388,361)|
1,10,11,8,100,0,0,22,0,0,0,-1--1--1,,1|(293,361)|
11,11,48,341,361,6,8,34,3,0,0,1,0,0,0
10,12,Production 2,341,380,41,11,32,3,0,0,-1,0,0,0
10,13,Noise 1,310,110,26,11,0,3,0,0,0,0,0,0
10,14,Total Demand,210,260,45,11,0,3,0,0,0,0,0,0
10,15,Demand Elasticity,90,200,56,11,0,3,0,0,0,0,0,0
10,16,Distribution Cost,60,260,53,11,0,3,0,0,0,0,0,0
10,17,Noise 2,360,440,26,11,0,3,0,0,0,0,0,0
10,18,Substitution Elasticity,390,260,66,11,0,3,0,0,0,0,0,0
10,19,Share 1,560,260,26,11,0,3,0,0,0,0,0,0
10,20,Price 2,590,330,24,11,0,3,0,0,0,0,0,0
10,21,Price 1,620,190,24,11,0,3,0,0,0,0,0,0
10,22,Reference Production,480,440,68,11,0,3,0,0,0,0,0,0
10,23,Reference Production,670,100,77,11,0,2,0,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128
10,24,Average Price,690,260,45,11,0,3,0,0,0,0,0,0
1,25,1,21,1,0,0,0,0,64,0,-1--1--1,,1|(561,156)|
1,26,2,20,1,0,0,0,0,64,0,-1--1--1,,1|(542,357)|
1,27,20,24,0,0,0,0,0,64,0,-1--1--1,,1|(633,298)|
1,28,21,24,0,0,0,0,0,64,0,-1--1--1,,1|(650,220)|
1,29,19,24,0,0,0,0,0,64,0,-1--1--1,,1|(608,260)|
1,30,18,19,0,0,0,0,0,64,0,-1--1--1,,1|(488,260)|
1,31,20,19,1,0,0,0,0,64,0,-1--1--1,,1|(586,296)|
1,32,21,19,1,0,0,0,0,64,0,-1--1--1,,1|(605,221)|
1,33,19,11,1,0,0,0,0,64,0,-1--1--1,,1|(425,301)|
1,34,19,7,1,0,0,0,0,64,0,-1--1--1,,1|(446,228)|
1,35,14,7,1,0,0,0,0,64,0,-1--1--1,,1|(244,208)|
1,36,14,11,1,0,0,0,0,64,0,-1--1--1,,1|(261,314)|
1,37,17,12,0,0,0,0,0,64,0,-1--1--1,,1|(352,416)|
1,38,13,6,0,0,0,0,0,64,0,-1--1--1,,1|(322,127)|
1,39,22,20,0,0,0,0,0,64,0,-1--1--1,,1|(530,389)|
1,40,23,21,0,0,0,0,0,64,0,-1--1--1,,1|(648,138)|
1,41,24,14,1,0,0,0,0,64,0,-1--1--1,,1|(427,526)|
1,42,15,14,0,0,0,0,0,64,0,-1--1--1,,1|(143,226)|
1,43,16,14,0,0,0,0,0,64,0,-1--1--1,,1|(132,260)|
10,44,seed,220,90,16,11,0,3,0,0,-1,0,0,0
1,45,44,13,0,0,0,0,0,0,0,-1--1--1,,1|(253,96)|
10,46,seed,399,480,25,11,0,2,0,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128
1,47,46,17,0,0,0,0,0,64,0,-1--1--1,,1|(384,464)|
10,48,Reference Demand,80,360,60,11,0,3,0,0,-1,0,0,0
1,49,48,14,0,0,0,0,0,0,0,-1--1--1,,1|(138,314)|
10,50,Reference Price,70,310,50,11,0,3,0,0,-1,0,0,0
1,51,50,14,0,0,0,0,0,0,0,-1--1--1,,1|(132,287)|
10,52,Demand Growth Rate,130,440,69,11,0,3,0,0,-1,0,0,0
1,53,52,48,0,0,0,0,0,0,0,-1--1--1,,1|(108,405)|
10,54,Time,10,420,26,11,0,2,0,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128
1,55,54,48,0,0,0,0,0,0,0,-1--1--1,,1|(39,394)|
10,56,INITIAL TIME,20,480,60,11,0,2,0,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128
1,57,56,48,0,0,0,0,0,0,0,-1--1--1,,1|(46,426)|
10,58,Reference Price,739,160,59,11,0,2,0,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128
10,59,Reference Price,580,420,59,11,0,2,0,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128
1,60,59,20,0,0,0,0,0,64,0,-1--1--1,,1|(583,381)|
1,61,58,21,0,0,0,0,0,64,0,-1--1--1,,1|(676,175)|
10,62,Base Demand,180,410,45,11,0,3,0,0,-1,0,0,0
1,63,62,48,0,0,0,0,0,0,0,-1--1--1,,1|(136,388)|
12,64,0,343,26,300,20,8,4,0,2,-1,0,0,0,0-0-0,0-0-0,|12||0-0-255
Moxnes, Erling (1992). Positive Feedback Economics and the Competition Between 'Hard' and 'Soft' Energy Supplies. Journal of Scientific and Industrial Research, 51(March), 257-265. 
12,65,0,340,60,168,11,0,4,0,2,-1,0,0,0,0-0-0,0-0-0,|12||0-0-255
Replicated by Tom Fiddaman, Ventana Systems, 1998
///---\\\
:L<%^E!@
1:Current2.vdf
1:Current.vdf
9:Current2
22:$,Dollar,Dollars,$s
22:Day,Days
22:Hour,Hours
22:Month,Months
22:Person,People,Persons
22:Unit,Units
22:Week,Weeks
22:Year,Years
15:0,0,0,0
19:100,0
4:Time
5:Share 1