--- a/src/economy_new.h	Tue Mar 13 15:46:40 2007 +0000
+++ b/src/economy_new.h	Tue Mar 13 16:04:23 2007 +0000
@@ -12,12 +12,19 @@
 #include "functions.h"      // RandomRange
 
 /**
+ * A Base Class used for economic entities in the game that use an activity level
+ */
+class EconomicObject {
+protected:
+	FixedT<int64, 16> m_activity_level;   ///< Economic Activity Level, an indicator for the GDP per capita of the map
+};
+
+/**
  * Handles all the economic data and events
  */
-class CEconomy {
+class CEconomy : EconomicObject {
 private:
 	FixedT<int32, 16> m_basic_growth;     ///< Basic growth number, depends solely on difficulty setting
-	FixedT<int64, 16> m_activity_level;   ///< Economic Activity Level, an indicator for the GDP per capita of the map
 	byte              m_long_term_cycle;  ///< The period of the long-term cycle suggested by Kondratiev
 	byte              m_short_term_cycle; ///< The period of the short-term cycle (see Juglar, others)
 	FixedT<int32, 16> m_long_term_ampl;   ///< Amplitude of the long-term cycle
@@ -92,6 +99,7 @@
 		DEBUG(eco, 5, "Added a random event with a value of %f, adjusted EAL to %f", (double)mod, (double)m_activity_level);
 	}
 
+private:
 	/**
 	 * Computes the modification of economic growth by cyclic events
 	 * @return The growth modification