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73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
/** Replicate Imai, Jain and Ching Econometrica 2009 (incomplete).
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**/
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#include "IJCEmet2009.h"
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Kapital::Kapital(L,const N,const entrant,const exit,const KP){
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StateVariable(L,N);
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this.entrant = entrant;
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this.exit = exit;
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this.KP = KP;
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actual = Kbar*vals/(N-1);
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upper = log(actual~.Inf);
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}
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Kapital::Transit(FeasA) {
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decl ent =CV(entrant), stayout = FeasA[][exit.pos], tprob, sigu = CV(KP[SigU]);
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if (!v && !ent) return { <0>, ones(stayout) };
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tprob = ent ? probn( (upper-CV(KP[Kbe]))/sigu )
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: probn( (upper-(CV(KP[Kb0])+CV(KP[Kb2])*upper[v])) / sigu );
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tprob = tprob[1:] - tprob[:N-1];
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return { vals, tprob.*(1-stayout)+(1.0~zeros(1,N-1)).*stayout };
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}
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FirmEntry::Run() {
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Initialize();
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GenerateSample();
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BDP->BayesianDP();
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}
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FirmEntry::Initialize() {
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Rust::Initialize(Reachable,0);
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sige = new StDeviations("sige",<0.3,0.3>,0);
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entrant = new LaggedAction("entrant",d);
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KP = new array[Kparams];
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KP[Kbe] = new Positive("be",0.5);
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KP[Kb0] = new Free("b0",0.0);
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KP[Kb1] = new Determined("b1",0.0);
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KP[Kb2] = new Positive("b2",0.4);
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KP[SigU] = new Positive("sigu",0.4);
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EndogenousStates(K = new Kapital("K",KN,entrant,d,KP),entrant);
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SetDelta(new Probability("delta",0.85));
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kcoef = new Positive("kcoef",0.1);
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ecost = new Negative("ec",-0.4);
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CreateSpaces();
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}
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FirmEntry::GenerateSample() {
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Volume = LOUD;
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EM = new ValueIteration(0);
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// EM -> Solve(0,0);
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data = new DataSet(0,EM);
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data->Simulate(DataN,DataT,0,FALSE);
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data->Print("firmentry.xls");
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BDP = new ImaiJainChing("FMH",data,EM,ecost,sige,kcoef,KP,delta);
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}
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/** Capital stock can be positive only for incumbents.
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**/
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FirmEntry::Reachable() { return CV(entrant)*CV(K) ? 0 : new FirmEntry() ; }
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/** The one period return.
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<DD>
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<pre>U = </pre>
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</DD>
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**/
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FirmEntry::Utility() {
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decl ent = CV(entrant),
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u =
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ent*CV(ecost)+(1-ent)*CV(kcoef)*AV(K)
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| 0.0;
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return u;
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}
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