Economía laboral - El equilibrio parcial (Marshall)

Equilibrium Analysis in Economics

Introduction to Partial Equilibrium

• The class discusses the concept of partial equilibrium, a method introduced by classical economists to analyze market adjustments and equilibria.

• It focuses on markets with various producers within the same sector, acknowledging the complexity and interrelations among different productive sectors.

Marshall's Contributions

• Marshall's analysis excludes factor markets, adhering instead to general equilibrium logic as seen in other economic theories.

• His significant contribution is the supply and demand graph, which visually represents market dynamics.

Understanding Supply and Demand

• Marshall viewed economics not just as resource allocation but aimed to understand how resources acquire their value.

• The "Marshallian cross" simplifies market equilibrium by examining two variables: price (independent variable) and quantity (dependent variable).

Market Dynamics Explained

• Producers are inclined to offer more goods at higher prices, indicating a positive relationship between price and supply.

• Conversely, consumers tend to buy more at lower prices, establishing an inverse relationship between price and demand.

Concept of Market Equilibrium

• Market equilibrium occurs when the quantity supplied equals the quantity demanded at a specific price point.

• A simulation shows that if prices rise, demand decreases while supply increases; thus highlighting differing behaviors of supply and demand under changing conditions.

Price Changes Impacting Demand and Supply

• If prices increase beyond equilibrium, suppliers may provide more than what consumers are willing to buy at that price level.

• Conversely, lowering prices below equilibrium leads consumers to purchase more than suppliers are willing to produce.

Shifts in Demand Without Supply Response

• The model illustrates potential scenarios where demand increases without corresponding changes in supply—leading to higher product prices due to scarcity.

• This situation can be visualized through a rightward shift of the demand curve without any adjustment from suppliers.

Conclusion on Economic Reactions

Understanding Market Dynamics

The Relationship Between Supply and Demand

• When a producer increases their productive capacity or discovers a new process, they can release more products into the market. If this increase is not matched by demand, it typically results in lower prices.

• An increase in production accompanied by an increase in demand allows consumers to purchase more goods at the same price, indicating a balanced market scenario.

• The graph discussed illustrates that at a given price, suppliers must offer all their production while consumers can buy as much as they want at that price, leading to both suppliers and consumers being price takers.

Historical Context of Economic Theories

• Alfred Marshall's theoretical foundations for his graphical representation reveal deeper insights into market dynamics than initially apparent. His work builds on previous theories from notable economists.

• Two significant antecedents to Marshall's work are those of Turner and Walras, who approached market equilibrium from different theoretical perspectives—Turner focusing on partial equilibrium and Walras on general equilibrium.

Market Equilibrium Concepts

• Turner identified two types of market equilibria: monopoly (where one supplier has significant power over pricing) versus perfect competition (where no single entity can influence prices).

• Walras' general equilibrium theory posits that agents make decisions based on fixed prices rather than influencing them directly. This contrasts with Marshall’s focus on normal versus actual market behavior.

Short-Term vs Long-Term Decision Making

• Marshall differentiates between "market behavior" (short-term buying/selling activities at current prices) and "normal behavior" (long-term purchasing/selling decisions based on expected average prices).

• Normal decisions depend on anticipated average prices over time; individuals base short-term actions on current trends but aim for long-term objectives despite daily fluctuations.

Price Expectations and Consumer Behavior

• Consumers often delay purchases if they anticipate better future pricing opportunities, reflecting their long-term goals despite immediate market conditions affecting availability.

• Real-life examples illustrate this concept: when desired products are unavailable due to high demand or strategic withholding by sellers, consumers wait for optimal purchasing moments.

Causal Relationships in Pricing

• There exists a causal link where normal prices guide market behaviors rather than the other way around; economic actors set long-term goals influenced by these expectations.

Market Equilibrium and Demand-Supply Dynamics

Understanding Market Imbalance

• A market is in imbalance when the demand price differs from the supply price, leading to a situation where producers are incentivized to adjust their output based on demand levels.

• If demand exceeds supply (i.e., consumers are willing to pay more than the supply price), producers will likely increase production or reduce stock by selling stored goods.

Supply Adjustments Based on Demand

• Conversely, if consumers are willing to pay less than what suppliers want, this results in a decrease in supply, either through reduced production or increased inventory as unsold goods remain stored.

Price vs. Quantity Modifications

• Initially, adjustments occur in quantities rather than prices; raising prices unilaterally can make products less attractive compared to competitors who maintain lower prices.

Conclusion of Perfect Competition Discussion