Essential Concepts in Economics, Budgeting, and Statistics
Zero-Based Budgeting
Zero-based budgeting is a method in which all expenses must be justified for each new period. The budget starts at a zero base, and every function within the organization is analyzed for its needs and costs. Therefore, budgets are built based on what is required for the upcoming period, regardless of the previous budget size.
Taxes
Taxes are a compulsory contribution to state revenue. It is mandatory to pay taxes, which are levied by the government on workers’ income and business profits, or added to the cost of goods, services, or transactions. Taxes raise money for government services that are used for the well-being of society.
The Fiscal Year Process
The fiscal year runs from October through September of the following year. The process involves:
- February: The President proposes the budget.
- Budget Committee: Reaches a budget resolution.
- Approval: The House and Senate approve the resolution, which is then distributed to committees to determine fund allocation.
- Conference Committee: The House and Senate reach a reconciled final version.
- Final Step: The President either approves or vetoes the budget.
Accounting: Private vs. Nonprofit Entities
Private entities are primarily concerned with profitability and sustainability, often managing larger, more flexible budgets. In contrast, nonprofit entities focus on maintaining infrastructure and providing for the security and welfare of the community.
Central Limit Theorem
The Central Limit Theorem is a statistical theory stating that, given a sufficiently large sample size from a population with finite variance, the mean of all samples will be approximately equal to the population mean. Furthermore, the samples will follow an approximate normal distribution, with variances approximately equal to the population variance divided by the sample size.
Survivorship Bias
Survivorship bias is the logical error of concentrating on entities that passed a selection process while overlooking those that did not, typically due to a lack of visibility. This is a form of selection bias that leads to false conclusions when observations are lost or discarded before analysis, skewing the remaining sample.
Sampling Techniques
- Cluster Sampling: Dividing a population into similar clusters, then drawing observations from several randomly chosen clusters.
- Stratified Sampling: Randomly choosing observations from within defined subpopulations (strata) to ensure each stratum is represented proportionally.
Types of Budgets
- Program Budget: Prepared specifically for a single project or program, isolating its specific expenses and revenues.
- Performance Budget: Reflects the input of resources and output of services for each unit, often used by government bodies to link taxpayer funds to service outcomes.
- Expenditure Budget: Shows revenue and capital disbursements of various departments, providing a detailed analysis of expenditures and reasons for estimate variations.
The Role of Government
Economists view the role of government as essential for:
- Identifying and protecting property rights.
- Facilitating general trade and fair trade practices.
- Providing public goods and services (e.g., defense, law enforcement).
- Ameliorating market failures.
Understanding Type I and Type II Errors
- Type I Error: Occurs when the null hypothesis is rejected even though it is true.
- Type II Error: Occurs when the null hypothesis is accepted even though it is false.