diff -ruN -X cvs/diff_ignore cleancvs/common/game.h cvs/common/game.h
--- cleancvs/common/game.h	Mon May 29 15:23:23 2000
+++ cvs/common/game.h	Sat Jun  3 00:38:28 2000
@@ -85,6 +85,7 @@
   int add_to_size_limit;
   int spacerace;
   int turnblock;
+  int impeffect;
   int auto_ai_toggle;
   int fogofwar;
   int fogofwar_old;	/* as the fog_of_war bit get changed by setting
diff -ruN -X cvs/diff_ignore cleancvs/server/gamehand.c cvs/server/gamehand.c
--- cleancvs/server/gamehand.c	Wed May 17 15:32:06 2000
+++ cvs/server/gamehand.c	Sat Jun  3 00:43:27 2000
@@ -368,6 +368,8 @@
 						 "game.killcitizen");
   game.turnblock = secfile_lookup_int_default(file,game.turnblock,
                          "game.turnblock");
+  game.impeffect = secfile_lookup_int_default(file,game.impeffect,
+                         "game.impeffect");
   game.barbarianrate = secfile_lookup_int_default(file, game.barbarianrate,
 						  "game.barbarians");
   game.onsetbarbarian = secfile_lookup_int_default(file, game.onsetbarbarian,
@@ -590,6 +592,7 @@
   secfile_insert_int(file, game.aqueductloss, "game.aqueductloss");
   secfile_insert_int(file, game.killcitizen, "game.killcitizen");
   secfile_insert_int(file, game.turnblock, "game.turnblock");
+  secfile_insert_int(file, game.impeffect, "game.impeffect");
   secfile_insert_int(file, game.barbarianrate, "game.barbarians");
   secfile_insert_int(file, game.onsetbarbarian, "game.onsetbarbs");
   secfile_insert_int(file, game.occupychance, "game.occupychance");
diff -ruN -X cvs/diff_ignore cleancvs/server/ruleset.c cvs/server/ruleset.c
--- cleancvs/server/ruleset.c	Wed May 24 21:13:05 2000
+++ cvs/server/ruleset.c	Sat Jun  3 00:40:59 2000
@@ -947,6 +947,9 @@
       e->amount =
 	secfile_lookup_int_default(&file, 0, "%s.effect%d.amount", sec[i], j);
 
+      if ( !b->is_wonder )
+	  e->amount *= game.impeffect;
+
       item =
 	secfile_lookup_str_default(&file, "", "%s.effect%d.cond_bldg", sec[i], j);
       if (*item) {
diff -ruN -X cvs/diff_ignore cleancvs/server/stdinhand.c cvs/server/stdinhand.c
--- cleancvs/server/stdinhand.c	Sun May 28 00:06:25 2000
+++ cvs/server/stdinhand.c	Sat Jun  3 00:37:52 2000
@@ -576,6 +576,12 @@
     N_("If this is set to 1 the game turn is not advanced until all players "
        "have finished their turn, including disconnected players.") },
   
+  { "impeffect", &game.impeffect,
+    SSET_META, SSET_TO_CLIENT,
+    1, 10, 1,
+    N_("Improvement effect modifier"),
+    N_("The effect of city improvements are multiplied bu this number.") },
+  
   { "demography", NULL,
     SSET_META, SSET_TO_CLIENT,
     0, 0, 0,