Microeconomics Overview and Economic Principles

Microeconomics, as described in the Fourteenth Edition by Michael Parkin, offers a foundation for understanding economic principles.

All economic questions arise due to the following conditions:
- We desire more than we can obtain.
- This inability to meet all our wants is termed scarcity.
- Scarcity necessitates choice-making.
Choices are influenced by the incentives that individuals and organizations face.
- Incentive Definition: A reward that motivates an action or a penalty that discourages a behavior.

Economics is framed by two pivotal questions:
- How do choices dictate the production of goods and services (what, how, and for whom)?
- Do choices made for self-interest align with or promote social interests?

The choices and their impacts on production are influenced by various metrics.
- Economic patterns can be depicted through graphical representations and statistical data across different nations (US, China, Ethiopia).

Historical measures such as educational attainment in the US since 1900 illustrate trends in human capital growth relevant to economic development.

Self-Interest: Personal choices believed to benefit the chooser.
Social Interest: Choices that benefit society as a whole, characterized by two dimensions:
- Efficiency: Resource allocation that cannot improve one person's situation without worsening another's.
- Fair Shares: The ideal of equitable distribution; however, defining a "fair share" is complex and subjective.

Various topics challenge and demonstrate the tensions between self-interest and social interest, such as:
- Globalization: Expands international trade and investment, potentially benefiting consumers but posing risks to low-wage workers and domestic firms.
- Information-Age Monopolies: Technological advancements benefitting individuals (e.g., smartphones) while raising questions about overall societal benefits.
- Climate Change: Individual choices impacting environmental sustainability, probing whether personal actions align with societal benefit.
- COVID-19 Pandemic: The balance of personal health choices (social isolation) against broader health outcomes for society.

Rational Choice: Defined as decisions which compare costs and benefits to maximize personal benefit. The choices reflect individual preferences.

Benefit Definition: The pleasure or gain realized from a choice, influenced by personal preferences.
Cost Definition: The value of the next best alternative forgone; crucial in assessing any choice.
- Opportunity Cost: The most valuable option sacrificed to undertake a chosen action, encompassing both financial costs and time.
Example of Opportunity Cost:
- Attending a live concert may involve:
- Foregoing other purchases due to ticket costs.
- Sacrificing alternative activities one could engage in during concert time.

Choosing at the Margin: Involves decisions made by evaluating incremental changes rather than all-encompassing choices.
- Decision-making example: Allocating study time vs. leisure communication.
- Rationality stems from comparing marginal benefits against marginal costs, determining that if the benefit exceeds the cost, one should pursue the activity further.

Economists distinguish between two statement types:
- Positive Statements: Objective, factual claims that can be tested against empirical evidence.
- Normative Statements: Subjective opinions that are not testable.

Economists employ models to analyze economic phenomena:
- An economic model simplifies relevant aspects of the economy to predict outcomes.
Testing models is complex, employing methods like:
- Natural experiments
- Statistical investigations
- Economic experiments

Economists serve dual roles:
- As theorists, they elucidate economic principles.
- As policy advisors, they assist in evaluating potential solutions for socio-economic issues by contrasting marginal benefits vs. costs.

Economics graduates can explore various careers, with roles encompassing:
- Data collection and analysis
- Future trend prediction
- Resource allocation efficiency studies
Employment sectors include:
- Private firms, government, international organizations.

From 2019 to 2029:
- Economics Ph.D. holders: Expected job growth of 14%.
- Budget analysts: 3% growth expected.
- Financial analysts: Anticipated 5% growth.
- Market Research Analysts: Expected to grow by 18%.

According to payscale.com, earnings for economists range between:
- $56,500 to $139,600, with a median at $105,100 annually.
- Mid-career economists with a Ph.D. typically earn around $150,000 per year.
- Analyst roles average around $55,000 annually for market research, and $82,000 for financial analysts.

Between 1995 and 2015, there's been an observable shift in the ratios of women and minorities in economics versus STEM degrees, indicating a need for improved diversity and representation in economics at all professional levels.