diff --git a/modules/22_subsidizeLearning/globallyOptimal/presolve.gms b/modules/22_subsidizeLearning/globallyOptimal/presolve.gms
index 70751e544..20a544940 100644
--- a/modules/22_subsidizeLearning/globallyOptimal/presolve.gms
+++ b/modules/22_subsidizeLearning/globallyOptimal/presolve.gms
@@ -10,21 +10,37 @@
 p22_deltacap0(ttot,regi,teLearn,rlf)$( (ttot.val ge 2005) and (pm_SolNonInfes(regi) eq 1)) = vm_deltaCap.l(ttot,regi,teLearn,rlf);
 
 $ifthen.altLearnRegiSet not "%cm_altLearnRegiSet%" == "off"
-  loop((ttot,regi,teLearn),
+  loop((regi,teLearn),
     if(altLearnRegi22(regi,teLearn),
-      pm_capCumForeign(ttot,regi,teLearn)$(ttot.val ge 2005) = sum(regi2$((not sameas(regi2,regi)) and (altLearnRegi22(regi2,teLearn))), pm_capCum0(ttot,regi2,teLearn) );  
+      pm_capCumForeign(ttot,regi,teLearn)$(ttot.val ge 2005) = 
+***	    global cumulative capacity excluding region for years before 2025
+        sum(regi2$((not sameas(regi2,regi)) and (ttot.val ge 2005) and (ttot.val le 2020)), 
+          pm_capCum0(ttot,regi2,teLearn) 
+        )
+        +
+***	    2020 cumulative capacity for other regions plus sub-region cumulative capacity for years after 2020
+		sum((regi2,ttot)$((not sameas(regi2,regi)) and (NOT(altLearnRegi22(regi2,teLearn))) and (ttot.val ge 2025)),
+          pm_capCum0("2020",regi2,teLearn) 
+		)
+        +
+		sum((regi2,ttot)$((not sameas(regi2,regi)) and (altLearnRegi22(regi2,teLearn)) and (ttot.val ge 2025)),
+          pm_capCum0(ttot,regi2,teLearn) 
+		)
+	  ;
     else
-      pm_capCumForeign(ttot,regi,teLearn)$(ttot.val ge 2005) = sum(regi2$((not sameas(regi2,regi)) and (not altLearnRegi22(regi2,teLearn))), pm_capCum0(ttot,regi2,teLearn) );  
+      pm_capCumForeign(ttot,regi,teLearn)$(ttot.val ge 2005) = 
+	    sum(regi2$((not sameas(regi2,regi)) and (not altLearnRegi22(regi2,teLearn))),
+		  pm_capCum0(ttot,regi2,teLearn) 
+		);  
     );
   );
 $else.altLearnRegiSet
-  loop((ttot,regi,teLearn),
-    pm_capCumForeign(ttot,regi,teLearn)$(ttot.val ge 2005) = sum(regi2$(not sameas(regi2,regi)), pm_capCum0(ttot,regi2,teLearn) );  
-  );
+  pm_capCumForeign(ttot,regi,teLearn)$(ttot.val ge 2005) = sum(regi2$(not sameas(regi2,regi)), pm_capCum0(ttot,regi2,teLearn) );  
 $endif.altLearnRegiSet
 
 display pm_capCumForeign;
 
+
 * calculate marginal benefit of spillovers in each region. This expression for the subsidy can be derived analytically.
 loop(regi$(pm_SolNonInfes(regi) eq 1),
     p22_marginalCapcumBenefit(ttot,regi,teLearn)  =