Economics

Step 1: Define the economic systems based on ownership and control of means of production.
- Capitalist Economy (Market Economy): Means of production are predominantly privately owned and operated for profit.
Economic decisions (what to produce, how to produce, for whom to produce) are primarily determined by market forces (demand and supply).
Limited government intervention.
- Socialist Economy (Command Economy/Centrally Planned Economy): Means of production are predominantly socially owned (usually by the state).
Economic decisions are primarily made by a central planning authority.
Aims for social welfare and equitable distribution.
- Mixed Economy: An economic system that combines elements of both capitalism and socialism.
It features co-existence of private and public sectors.
The government plays a role in regulating the economy, providing public goods and services, and addressing market failures, while allowing for private enterprise and market mechanisms.
- Developed Economy: Refers to a country with a high level of economic development, characterized by high per capita income, advanced industrialization, high Human Development Index (HDI), etc.
It describes a stage of development, not the fundamental system of ownership/control (though most developed economies are mixed, often with a strong market orientation).

Step 2: Identify the system characterized by co-existence of public and private sectors.
The Mixed Economy is defined by the co-existence and interplay of both public (government-owned/controlled) and private sectors.
This matches option (2).

Step 1: Recall famous definitions or characterizations of economics.
Defining economics precisely has been a subject of ongoing discussion among economists.
Various definitions focus on scarcity, choice, wealth, welfare, etc.

Step 2: Identify the economist associated with the given statement.
The somewhat circular and pragmatic definition, "Economics is what economists do," is attributed to Jacob Viner (1892–1970), a Canadian-American economist who taught at the University of Chicago and Princeton University.
This statement highlights the evolving nature of the discipline and suggests that the scope of economics is best understood by observing the actual work and subject matter that economists engage with.

Step 3: Consider other economists.
- (1) Adam Smith: Often called the "Father of Modern Economics," known for "The Wealth of Nations" (1776).
His definition focused on "an inquiry into the nature and causes of the wealth of nations.
" - (3) Alfred Marshall: A highly influential economist, author of "Principles of Economics" (1890).
He defined economics as "a study of mankind in the ordinary business of life; it examines that part of individual and social action which is most closely connected with the attainment and with the use of the material requisites of wellbeing.
" (Often considered a welfare definition).
- (4) Paul Samuelson: A Nobel laureate in economics, author of the influential textbook "Economics.
" He provided a widely cited definition focusing on scarcity and choice: "Economics is the study of how societies use scarce resources to produce valuable commodities and distribute them among different people.
"
Step 4: Confirm the author of the statement.
The statement "Economics is what economists do" is attributed to Jacob Viner.
This matches option (2).

Step 1: Define fixed capital and working capital.
In economics and business, capital is categorized based on its nature and use: - Fixed Capital: Refers to durable assets that are used repeatedly in the production process over a long period.
They are not consumed or converted into cash in a single operating cycle.
Examples include land, buildings, machinery, tools (if durable and long-lasting).
- Working Capital: Refers to the capital required for day-to-day operations of a business.
It is the difference between current assets and current liabilities.
Current assets include cash, accounts receivable, inventory of raw materials and finished goods.
These are expected to be converted into cash within one operating cycle (usually a year).

Step 2: Classify the given options.
Option (1) Tools: If these are durable tools used over many production cycles, they are typically considered fixed capital.
However, small, consumable tools might be part of current assets/expenses.
Option (2) Machines: These are classic examples of fixed capital, as they are long-term assets used in production.
Option (3) Buildings: These are also classic examples of fixed capital.
Option (4) Money in hand (Cash): Cash is the most liquid current asset and is a primary component of working capital.
It is used to meet daily operational expenses, purchase raw materials, pay wages, etc.

Step 3: Identify working capital.
Among the options, "Money in hand" (cash) is a direct component of working capital.
Tools, machines, and buildings are typically classified as fixed capital.
This matches option (4).