Contents
Version number
System requirements

Current Versions
LIMDEP 9.0
NLOGIT 4.0

System Requirements

LIMDEP AND NLOGIT are written for use on Windows driven microcomputers. LIMDEP and NLOGIT are compatible with Windows 95 and later Windows operating systems. The programs require 16 megabytes of memory and occupy approximately 10 megabytes on the local hard disk drive.

Program Limits

We are often asked about LIMDEP's specific internal limits. The following limits are relevant to the most common applications.

• Active Data Set
  Variables - 900
  Observations - 3,000,000+
  Total cells in data area limited by memory
  Namelists - 25
  Variables in namelist - 100
• Command Entry
  Characters in one command - 2,500
  Characters in a stored procedure - 2,500
  Commands in a stored procedure - 50
  Stored procedures - 10
  
• Model Size, General & Specific
  Number of parameters - 150
  Equations for SURE & 3SLS - 30
  Equations for WALD, NLSURE, GMM - 20
  
• Panel Data Models
  Groups in fixed & random effects: Linear models - unlimited & Nonlinear models - 50,000
  Regressors in fixed & random effects - 150
  Groups x Regressors - unlimited
  Intervals in TVCs for survival - 50
  Periods in fixed effects (Chamberlain) logit - 100
  Groups in time series/cross section - 100
  
• NLOGIT
  Number of alternatives - 100
  Branches in tree - 25
  Limbs in tree - 10
  Trunks in tree - 5
  Number of attributes & constants - 125
  
• Matrix & Scalar Algebra
  Number of active matrices - 100
  Number of active named scalars - 50
  Size of a matrix 50,000 - cells
  Rows in data matrix - unlimited