The Slicing Method and the Lumping Method (Partial vs General Equilibrium)

Because Microeconomics and Macroeconomics study the economy at two different levels, they also use two different METHODS of analysis — a difference the Maharashtra HSC (MSBSHSE) Economics syllabus illustrates with a simple image: think of the whole economy as a large loaf of bread.

The Slicing Method (Microeconomics). Microeconomics studies the economy the way one might study a loaf of bread by cutting it into individual SLICES and examining each slice separately, in isolation from the rest of the loaf. It isolates one consumer, one firm, one industry, or one market at a time, and studies how price and quantity are determined within that one unit, assuming everything else in the economy stays unchanged. This is why Microeconomics uses PARTIAL EQUILIBRIUM analysis — equilibrium (a state of balance between demand and supply) is worked out for ONE market at a time, treating conditions in every other market as given and constant ('ceteris paribus').

The Lumping Method (Macroeconomics). Macroeconomics, in contrast, studies the economy the way one might study the entire loaf of bread as ONE WHOLE, without cutting it into slices at all — it 'lumps together' millions of individual consumers, firms and markets into a small number of economy-wide totals (aggregates), such as national income, aggregate demand, and the general price level. Because it looks at the whole economy together, and because many markets and sectors are genuinely inter-related and adjust simultaneously, Macroeconomics uses GENERAL EQUILIBRIUM analysis — the joint, simultaneous equilibrium of ALL markets in the economy together, rather than holding everything but one market constant.