--- a
+++ b/inst/average_moments.m
@@ -0,0 +1,55 @@
+# Copyright (C) 2003,2004,2005  Michael Creel <michael.creel@uab.es>
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ 
+# for internal use by gmm_estimate 
+
+
+# average moments (separate function so it can be differentiated)
+function m = average_moments(theta, data, moments, momentargs)
+	
+	global NSLAVES PARALLEL NEWORLD NSLAVES TAG;
+
+	n = rows(data);
+
+	if PARALLEL
+    		nn = floor(n/(NSLAVES + 1)); # save some work for master
+    
+		#  The command that the slave nodes will execute
+    		cmd=['contrib = sum_moments_nodes(theta, data, moments, momentargs, nn); ',...	
+         		'MPI_Send(contrib,0,TAG,NEWORLD);'];	
+
+		# send items to slaves
+		NumCmds_Send({"theta", "nn", "cmd"},{theta, nn, cmd});
+
+		# evaluate last block on master while slaves are busy
+   		m = feval("sum_moments_nodes", theta, data, moments, momentargs, nn);
+
+		# collect slaves' results
+		contrib = zeros(1,columns(m));
+    		for i = 1:NSLAVES
+			MPI_Recv(contrib,i,TAG,NEWORLD);
+			m = m + contrib;
+    		endfor
+
+		m = m'; # we want a column vector, please
+		m = m/n; # average please, not sum
+
+	else # serial version
+		m = feval(moments, theta, data, momentargs);
+		m = mean(m)';  # returns Gx1 moment vector
+	endif
+	
+endfunction