Comprehensive Study Notes on Business Administration, Economics, and Investment Theory
Division of Economic Sciences
Economics, as a discipline, is bifurcated into two primary fields of study: Business Administration (Betriebswirtschaftslehre or BWL) and Economics (Volkswirtschaftslehre or VWL). Business Administration focuses on economic processes and decision-making within the boundaries of a single company. This includes specialized areas such as accounting, marketing, personnel management, financing, and production. Economics (VWL), conversely, examines the economic processes and interdependencies of the entire national or global economy, addressing themes like inflation, unemployment, economic growth, supply and demand, and economic policy.
Business Administration is further categorized into General and Special BWL. General BWL concerns itself with economic facts and principles relevant to all enterprises regardless of their industry, investigating universal functions like planning, organization, financing, and personnel. Special BWL delves into the specificities of certain functions or industries. It is divided into Functional BWL, which focuses on specific operational functions like financial management, accounting, or production across industries, and Institutional BWL, which considers all operational functions within the context of a specific industry, such as banking, trade, or social economy.
Economics is subdivided into Microeconomics and Macroeconomics. Microeconomics analyzes the behavior and decision-making of individual units, such as households, firms, and specific markets, looking at factors like price formation and individual supply and demand. Macroeconomics focuses on the aggregate economy, investigating overarching metrics like total inflation, national unemployment rates, and overall economic growth.
Objects and Principles of Business Administration
The experience object (Erfahrungsobjekt) of Business Administration is the operations unit or 'Betrieb'. This entity is not exclusive to BWL; it is also studied by other disciplines like industrial and organizational psychology. However, the selection principle (Auswahlprinzip) that defines the BWL perspective is the economic principle, also known as the efficiency principle. This principle is based on the axiom that goods are scarce and must be utilized rationally and economically.
The economic principle manifests in two forms. The Minimal Principle involves achieving a fixed objective (objetivo fijo) using the fewest possible resources (menos recursos). For example, a company aiming to produce strictly 1,000 units would seek to minimize material and financial input. The Maximal Principle involves achieving the greatest possible success (máximo resultado) using a fixed set of resources (recursos fijos). An example is a firm spending a fixed budget of $10,000\,€$ to produce as many units as possible. The actual discovery object (Erkenntnisobjekt) of BWL is the act of managing operations in companies through the lens of this economic principle.
Terminology: Betrieb, Unternehmen, and Firma
It is critical to distinguish between three often-confused terms. A 'Betrieb' is a technical and economic unit where goods are produced or services are offered. An 'Unternehmen' is the legal and economic entity that pursues specific economic goals and bears the entrepreneurial risk; this term encompasses branch offices and subsidiaries. A 'Firma' is specifically the name under which a company conducts its business and is officially entered into the commercial register.
Classification and Characterization of Operations
Companies and operations are categorized based on their objectives, outputs, and size. Economic goals are classified as formal goals (Formalziel), focusing on financial outcomes like profit maximization, sales increases (aumentar las ventas), cost reduction, and profitability, or substantive goals (Sachziel), which describe the concrete activity such as manufacturing a specific product. Entities are also classified by their profit orientation into Profit-oriented (aiming for gain) and Non-profit (where gain is not the primary objective).
Output-based classification distinguishes between material goods (Sachgut), such as automobiles, and intangible services (Dienstleistung), such as consulting. Furthermore, companies are categorized by industry (Wirtschaftszweig)—such as industry, trade, banking, or transport—and by size (Betriebsgröße), ranging from micro-enterprises to small, medium, and large corporations. There are two approaches to defining an operation: the Abstract definition, which looks at universal characteristics like resource usage and objective-setting shared by all firms, and the Pragmatic definition, which uses specific criteria to distinguish an operation from other entities, asking questions about resource usage, objective types, and output creation.
Markets and Their Classification
A market is defined as an abstract place of exchange where transactions occur between providers (Anbieter) and demanders (Nachfrager). A transaction is established when one actor offers a service or good and receives a counter-performance, typically a price. Markets are classified by five main criteria: by object (goods, labor, capital, real estate, or specific markets like fish or vegetables), by the provider-demander ratio (Monopoly with one provider, Oligopol with few providers like the fast-food market, or Polypol with many providers like local coffee shops), by spatial extent (regional, national, global), by function (the procurement market for buying resources and the sales market for selling goods), and by the degree of organization (organized vs. non-organized).
Specific Functional Markets
The Goods Market (Gütermarkt) involves the exchange of consumption goods, investment goods, or services. Providers include firms and public households, while demanders are households and other firms. The Labor Market (Arbeitsmarkt) is where labor is exchanged. Private households provide labor, while firms and other households act as employers/demanders. The counter-performance here is the salary.
The Capital Market (Kapitalmarkt) is a segment of the financial market where capital is exchanged. Providers are entities with excess funds (investors/banks), and demanders are those needing capital for projects, such as building a factory. The financial market also includes the Foreign Exchange Market (Devisenmarkt) for trading currencies like Euro vs. US-Dollar, and the Money Market (Geldmarkt) for short-term financial instruments with maturities typically up to two years (e.g., overnight money).
The Capital Market specifically handles long-term capital and is split into organized (regulated, such as bond and stock markets) and non-organized (less regulated, like crowdfunding). The stock market is further divided into the Primary Market for new share issues and the Secondary Market for trading existing shares between investors. The Credit Market is where loans and mortgages are processed.
Operational Production and Value Creation
The transformation of resources into value follows a three-step process. First is Input, comprising all necessary resources like raw materials (Rohstoffe), labor (Arbeitskräfte), machinery (Maschinen), and capital (Geld). Second is Transformation, the actual production process where inputs are combined. Finally, Output represents the resulting goods or services. Financially, the sale of products results in payments in (Einzahlungen), while paying suppliers results in payments out (Auszahlungen). Companies may receive state support via subsidies but must also pay taxes. Capital providers are compensated through dividends for equity or interest for debt.
Mathematical Principles of Efficiency and Profitability
Efficiency is the relationship between performance (Leistung) and cost (Kosten). Costs represent the value of goods and services consumed for production in a specific period, while performance is the result of production in monetary terms. General efficiency is calculated as follows:
When applying the Maximal Principle, efficiency is the ratio of actual performance (Ist-Leistung) to the maximum possible performance (Soll-Leistung) for a given input:
If a company produces 40 units out of a possible 50 for a given input, the efficiency is $40 / 50 = 0.8$ or $80\,\%$. Under the Minimal Principle, it is the ratio of minimum necessary costs (Soll-Kosten) to actual costs (Ist-Kosten) for a fixed output:
If the minimum cost is $800\,€$ but actual costs are $1,000\,€$, efficiency is $0.8$ or $80\,\%$.
Profitability (Rentabilität) relates profit to the capital employed. Key metrics include Return on Equity (Eigenkapitalrentabilität), Return on Total Capital (Gesamtkapitalrentabilität), and Profit Margin (Umsatzrentabilität). While efficiency looks at resource usage, profitability measures the success of the capital investment over time.
Corporate Governance: Shareholder vs. Stakeholder Value
The Shareholder Value approach prioritizes the interests of the owners or shareholders, aiming to maximize firm value and profit. This can lead to a focus on short-term gains. The Stakeholder Value approach considers all groups connected to the company, including employees, customers, suppliers, the state, and shareholders. It seeks a balance between these varied interests through cooperation.
Globalization and Internationalization
Globalization is the process of increasing global connectivity and cooperation between economies, leading firms to produce and trade across borders. Internationalization is the specific strategy a company uses to enter foreign markets via exports or local subsidiaries. In this context, German companies benefit from broader procurement markets for components (e.g., sourcing from China or Poland), diverse production locations, access to international sales markets, and expanded financing options on global capital markets.
Location Factors for Enterprises
Location choice can be bound (Gebundene Standortwahl), where the site is fixed by necessity, or free (Freie Standortwahl). Factors influencing this decision include logistics costs (transport and storage), labor costs (wages and labor productivity/unit labor costs), depreciation and interest burdens, and energy costs (electricity and gas prices). Additional factors include Cluster effects, where proximity to suppliers and research institutions (like Silicon Valley) provides advantages, market potential (customer proximity), and state-level factors like taxes, subsidies, infrastructure quality, political stability, and trade barriers.
European Policy and Economic Reality
The EU faces an ambivalence in energy policy, striving for climate neutrality and independence while still relying on energy imports (shifting dependence from Russia to countries like Qatar or the USA). The EU Supply Chain Directive requires companies to monitor environmental and human rights risks and create climate transformation plans. Investors remain skeptical of Germany and Europe due to high energy costs, heavy bureaucracy, skilled labor shortages, weak economic growth, and geopolitical uncertainties.
Legal Forms of Enterprises
The Unternehmergesellschaft (h.b.) or UG is a "mini-GmbH" requiring only $1\,€$ in minimum capital, with limited liability. It must save part of its profit until it reaches $25,000\,€$. The Gesellschaft mit beschränkter Haftung (GmbH) requires $25,000\,€$ in capital and is led by managing directors (Geschäftsführer). The Aktiengesellschaft (AG) requires $50,000\,€$ in capital, divided into shares; its structure includes the Management Board (Vorstand), Supervisory Board (Aufsichtsrat), and General Meeting (Hauptversammlung). The Societas Europaea (SE) is a European stock corporation with $120,000\,€$ minimum capital, allowing for either a dualistic (Management and Supervisory boards) or monistic (single administrative organ) management system.
Corporate Connections: Cooperation and Concentration
Cooperation occurs when companies work together voluntarily while remaining legally and economically independent. A concentration or conglomerate (Konzern) involves companies working closely together, relinquishing economic independence but remaining legally distinct. A fusion (merger) occurs when companies merge into one, losing both legal and economic independence. Relationships can be Horizontal (same industry/level), Vertical (different levels of the same value chain, e.g., supplier and manufacturer), or Diagonal (different industries, common in R&D). Forms of cooperation include informal arrangements, Joint Ventures (newly founded joint companies), strategic alliances (long-term strategic networks like Star Alliance), and Cartels (illegal agreements to restrict competition).
Investment Theory and Planning
Investment is the use of capital to generate future profit. Types include physical investments (Sachinvestitionen like machines), financial investments (stocks, bonds), and intangible investments (R&D, patents). Gross investment is the sum of replacement investment (Ersatzinvestitionen) and expansion investment (Erweiterungsinvestitionen). Planning involves checking the advantage of an investment and determining the optimal replacement time. Financial calculations include linear interest (calculated only on the initial capital) and exponential interest (compounded). Annuities (Annuität) are regular payments consisting of interest and repayment (Tilgung).
Investment Appraisal Methods
Static methods, such as the static amortization calculation, determine how quickly capital returns but often ignore the time value of money. Amortization is calculated as:
where the capital return (Kapitalrückfluss) equals profit plus depreciation. Dynamic methods consider the time value of money, recognizing that $1\,€$ today is worth more than $1\,€$ in a year due to interest. The internal rate of return (IRR) is compared against the calculation interest rate; an investment is profitable if the IRR exceeds the calculation rate. Success can also be measured by the Horizon Value method, which calculates terminal capital under specific accounting rules (Kontenausgleichverbot vs. Kontenausgleichgebot).
Investment Controlling
Investment controlling is essential because investments tie up capital long-term and can lead to liquidity bottlenecks (Liquiditätsengpass). Its tasks include providing information for decisions, creating investment plans, performing target-actual comparisons (Soll-Ist-Vergleich) to monitor deviations, and conducting risk analyses to preview maximum potential losses.