diff --git a/doc/dynare.texi b/doc/dynare.texi
index 513bbe5b4..74da5d5cc 100644
--- a/doc/dynare.texi
+++ b/doc/dynare.texi
@@ -9237,6 +9237,44 @@ do3 = dseries([1; 2; 3], 1999Q3, @{`var123'@}, @{`var_@{123@}'@});
 
 @noindent A list of the available methods, by alphabetical order, is given below.
 
+@deftypefn {dseries} {@var{A} =} abs (@var{B})
+
+Overloads the @code{abs()} function for @dseries objects. Returns the absolute value of the variables in @dseries object @var{B}.
+
+@examplehead
+@example
+>> ts0 = dseries(randn(3,2),'1973Q1',@{'A1'; 'A2'@},@{'A_1'; 'A_2'@});
+>> ts1 = ts0.abs();
+>> ts0
+ 
+ts0 is a dseries object:
+ 
+       | A1       | A2     
+1973Q1 | -0.67284 | 1.4367 
+1973Q2 | -0.51222 | -0.4948
+1973Q3 | 0.99791  | 0.22677
+ 
+>> ts1
+ 
+ts1 is a dseries object:
+ 
+       | abs(A1) | abs(A2)
+1973Q1 | 0.67284 | 1.4367 
+1973Q2 | 0.51222 | 0.4948 
+1973Q3 | 0.99791 | 0.22677
+ 
+>> ts1.tex
+
+ans = 
+
+    '|A_1|'
+    '|A_2|'
+@end example
+
+@end deftypefn
+
+@sp 1
+
 @deftypefn {dseries} {[@var{A}, @var{B}] = } align (@var{A}, @var{B})
 
 If @dseries objects @var{A} and @var{B} are defined on different time ranges, this function extends @var{A} and/or @var{B} with NaNs so that they are defined on the same time range. Note that both @dseries objects must have the same frequency.
diff --git a/matlab/@dseries/abs.m b/matlab/@dseries/abs.m
new file mode 100644
index 000000000..b8d49bce7
--- /dev/null
+++ b/matlab/@dseries/abs.m
@@ -0,0 +1,110 @@
+function A = abs(B) % --*-- Unitary tests --*--
+
+%@info:
+%! @deftypefn {Function File} {@var{A} =} abs (@var{B})
+%! @anchor{@dseries/uminus}
+%! @sp 1
+%! Overloads the abs method for the Dynare time series class (@ref{dseries}).
+%! @sp 2
+%! @strong{Inputs}
+%! @sp 1
+%! @table @ @var
+%! @item B
+%! Dynare time series object instantiated by @ref{dseries}.
+%! @end table
+%! @sp 1
+%! @strong{Outputs}
+%! @sp 1
+%! @table @ @var
+%! @item A
+%! Dynare time series object.
+%! @end deftypefn
+%@eod:
+
+% Copyright (C) 2013 Dynare Team
+%
+% This file is part of Dynare.
+%
+% Dynare 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 3 of the License, or
+% (at your option) any later version.
+%
+% Dynare 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 Dynare.  If not, see <http://www.gnu.org/licenses/>.
+
+A = dseries();
+
+A.freq = B.freq;
+A.nobs = B.nobs;
+A.vobs = B.vobs;
+A.init = B.init;
+A.dates = B.dates;
+A.name = cell(A.vobs,1);
+A.tex = cell(A.vobs,1);
+for i = 1:A.vobs
+    A.name(i) = {[ 'abs(' B.name{i} ')']};
+    A.tex(i) = {[ '|' B.tex{i} '|']};
+end
+A.data = abs(B.data);
+
+%@test:1
+%$ % Define a datasets.
+%$ A = randn(10,2);
+%$
+%$ % Define names
+%$ A_name = {'A1';'A2'};
+%$ A_tex = {'A_1';'A_2'};
+%$ t = zeros(6,1);
+%$
+%$ % Instantiate a time series object and compute the absolute value.
+%$ try
+%$    ts1 = dseries(A,[],A_name,A_tex);
+%$    ts2 = abs(ts1);
+%$    t(1) = 1;
+%$ catch
+%$    t = 0;
+%$ end
+%$
+%$ if t(1)
+%$    t(2) = dyn_assert(ts2.vobs,2);
+%$    t(3) = dyn_assert(ts2.nobs,10);
+%$    t(4) = dyn_assert(ts2.data,abs(A),1e-15);
+%$    t(5) = dyn_assert(ts2.name,{'abs(A1)';'abs(A2)'});
+%$    t(6) = dyn_assert(ts2.tex,{'|A_1|';'|A_2|'});
+%$ end
+%$ T = all(t);
+%@eof:1
+
+%@test:2
+%$ % Define a datasets.
+%$ A = randn(10,2);
+%$
+%$ % Define names
+%$ A_name = {'A1';'A2'};
+%$ A_tex = {'A_1';'A_2'};
+%$ t = zeros(6,1);
+%$
+%$ % Instantiate a time series object and compute the absolute value.
+%$ try
+%$    ts1 = dseries(A,[],A_name,A_tex);
+%$    ts2 = ts1.abs();
+%$    t(1) = 1;
+%$ catch
+%$    t = 0;
+%$ end
+%$
+%$ if t(1)
+%$    t(2) = dyn_assert(ts2.vobs,2);
+%$    t(3) = dyn_assert(ts2.nobs,10);
+%$    t(4) = dyn_assert(ts2.data,abs(A),1e-15);
+%$    t(5) = dyn_assert(ts2.name,{'abs(A1)';'abs(A2)'});
+%$    t(6) = dyn_assert(ts2.tex,{'|A_1|';'|A_2|'});
+%$ end
+%$ T = all(t);
+%@eof:2
\ No newline at end of file
diff --git a/matlab/@dseries/subsref.m b/matlab/@dseries/subsref.m
index f1cd3be25..486840c56 100644
--- a/matlab/@dseries/subsref.m
+++ b/matlab/@dseries/subsref.m
@@ -70,7 +70,7 @@ switch S(1).type
             error(['dseries::subsref: ' S(1).subs ' is not a method but a member!'])
         end
         B = builtin('subsref', A, S(1));
-      case {'log','exp','ygrowth','qgrowth','ydiff','qdiff'}         % Give "dot access" to public methods without args.
+      case {'log','exp','ygrowth','qgrowth','ydiff','qdiff','abs'}         % Give "dot access" to public methods without args.
         B = feval(S(1).subs,A);
         if length(S)>1 && isequal(S(2).type,'()') && isempty(S(2).subs)
             S = shiftS(S);