infospace: process book-1-chapter-03

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/entities/economic-opportunity-cost.md

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+# Economic Opportunity Cost
+
+## Definition
+
+The foregone benefits that result from limited market access, including the inability to specialise fully, the necessity of self-sufficiency, and the reduced potential for productivity gains through division of labour. Economic opportunity cost represents the price paid for restricted market extent.
+
+## Source Chapter
+
+Book I, Chapter 3
+
+## Context
+
+Smith illustrates economic opportunity cost through examples: the inability to dispose of one day's work per year for a nailer in the highlands, or the necessity for farmers to be their own butchers, bakers, and brewers, showing what is lost when markets are too small to support specialisation.
+
+## Economic Domain
+
+General Theory
+
+---