Class Firm

java.lang.Object
  |
  +--Firm

Direct Known Subclasses:

GenFirm, NNGenFirm, NWFirm, XCSFirm

public abstract class Firm

extends java.lang.Object

Abstract Class Firm.java
Murat Yildizoglu - Universite Bordeaux IV Montesquieu
Bordeaux FRANCE
e-mail: yildi[a_t]u-bordeaux4.fr
Copyright 2001 (c) Murat Yildizoglu
Permission to use, copy, modify, and distribute this
software and its documentation for NON-COMMERCIAL purposes
and without fee is hereby granted provided that this
copyright notice appears in all copies.

An abstract firm class with elementary characteristics of an evolutionary firm. Classes developped from this one must override many methods.

Version:

2.3 May 2001

Author:

Murat Yildizoglu

Field Summary

java.lang.String

type This variable is used by each type of firm for declaring its type

Constructor Summary

Firm(double kk0, double pprd0, double cc0, double dd0, double ssigma0, double ddelta0, double rrd0, double rr0, double rrd_min0)
The constructor.

Method Summary

abstract void	clean()
void	computeprofit(double Prix) Computes the gross profit rate on capital and the cumulates the gross profits of the firm
abstract int	getChrDecode(int cc)
abstract double	getChrFitness(int cc)
abstract double	getDFittness() Abstract methods for compatibility with GenFirm.
double	getdprim() Returns the Productivity increase throuh imitation of the firm
double	getdprin() Returns the Productivity increase throuh innovation of the firm
double	getinvestRD() Provides the amount of the R&D investment of the firm
double	getKapital() Returns the capital stock
double	getprod() Returns the productivity rate of the firm
abstract double	getProfit()
double	getProfitRate() Returns the gross profit rate of the firm
double	getrd() Returns the R&D ratio of the firm
void	imitate(double maxprod) Modifies the productivity of the firm as a consequence of an imitation
void	innovate() Modifies the productivity of the firm as a consequence of an innovation
void	investK() Computes the capital-investment following a very simple rule: The share of the profit that has not been invested in R&D is invested in physical capitaL
void	investRD() Computes the R&D-investment under the financial constraint given by the profit
boolean	isactive() Verifies if the firm is active.
abstract void	learn(int date) Abstract methods for compatibility with XCSFirm.
void	saveprofit() Saves the profit rate of the firm in temp_profit
abstract void	setenv(java.lang.String S)
abstract void	setrd(int t) Each firm must override these common abstract methods.
abstract java.lang.String	showFirm()
double	supply() Returns the productivity_rate x Kapital

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

type

public java.lang.String type

This variable is used by each type of firm for declaring its type

Constructor Detail

Firm

public Firm(double kk0,
            double pprd0,
            double cc0,
            double dd0,
            double ssigma0,
            double ddelta0,
            double rrd0,
            double rr0,
            double rrd_min0)

The constructor. Initialize common elements to all firms.

Parameters:

kk0 - Initial capital stock of the firm

pprd0 - Initial productivity of the firm

cc0 - Unit using cost of capital

dd0 - Calibration parameter

ssigma0 - Standard deviation of random innovative draws

ddelta0 - Depreciation rate of capital

rrd0 - RD/CF ratio

rr0 - Interest rate in the economy

rrd_min0 - Minimal RD investment rate

Method Detail

computeprofit

public void computeprofit(double Prix)

Computes the gross profit rate on capital and the cumulates the gross profits of the firm

Parameters:

Prix - : Price in the industry

getinvestRD

public double getinvestRD()

Provides the amount of the R&D investment of the firm

Returns:

investRD

investK

public void investK()

Computes the capital-investment following a very simple rule: The share of the profit that has not been invested in R&D is invested in physical capitaL

investRD

public void investRD()

Computes the R&D-investment under the financial constraint given by the profit

imitate

public void imitate(double maxprod)

Modifies the productivity of the firm as a consequence of an imitation

Parameters:

maxprod - Maximal productivity of the industry

innovate

public void innovate()

Modifies the productivity of the firm as a consequence of an innovation

getprod

public double getprod()

Returns the productivity rate of the firm

Returns:

prod

getKapital

public double getKapital()

Returns the capital stock

Returns:

K

supply

public double supply()

Returns the productivity_rate x Kapital

isactive

public boolean isactive()

Verifies if the firm is active. The firms is not active if its capital stock becomes too small while its profit is negative

getrd

public double getrd()

Returns the R&D ratio of the firm

Returns:

rd

getdprin

public double getdprin()

Returns the Productivity increase throuh innovation of the firm

Returns:

dprin

getdprim

public double getdprim()

Returns the Productivity increase throuh imitation of the firm

Returns:

dprim

getProfitRate

public double getProfitRate()

Returns the gross profit rate of the firm

Returns:

rd

saveprofit

public void saveprofit()

Saves the profit rate of the firm in temp_profit

setrd

public abstract void setrd(int t)

Each firm must override these common abstract methods.

getProfit

public abstract double getProfit()

clean

public abstract void clean()

showFirm

public abstract java.lang.String showFirm()

getDFittness

public abstract double getDFittness()

Abstract methods for compatibility with GenFirm.

See Also:

GenFirm

getChrDecode

public abstract int getChrDecode(int cc)

getChrFitness

public abstract double getChrFitness(int cc)

learn

public abstract void learn(int date)

Abstract methods for compatibility with XCSFirm.

See Also:

XCSFirm

setenv

public abstract void setenv(java.lang.String S)