First some properties about the Sum of squared residuals and the linear regression function are restated. In particular three properties that an ideal fitted regression line must fulfill are discussed. Then, the R squared is defined using the measures of the Sum of squared residuals, the total sum of squares and the sum of explained squares.
The total sum of squares and the total degrees of freedoms are disaggregated by calculating in sample variance and "between" sample variance and their respective degrees of freedoms. It is demonstrated numerically that both these measures add up to the total sum of squares and the total degrees of freedom.
First the global mean is calculated from a matrix of three sets each containing three observations. Then the sum of squares is calculated. Lastly, the concept of degree of freedom is explained.
The definition of a chi-square distribution is given. Chi-square is defined as the sum of random normally distributed variables (mean=0, variance=s.d.=1). The number of added squared variables is equal to the degrees of freedom. With more degrees of freedom the probability of larger chi-square values is increased.
First some terminology is explained. Then the interpretations of the coefficients and constants of the function are discussed. Afterwards the zero conditional mean assumption regarding the residual is problematized. Lastly, a graphical representation of a regression line is given and the least sum of squared errors is introduced and the equation for the coefficient of the linear function as well as for the intercept is given.
In 18th century Europe figures such as Adam Smith, David Ricardo, Friedrich List and Jean Baptiste Colbert developed theories regarding international trade, which either embraced free trade seeing it as a positive sum game or recommended more cautious and strategic approaches to trade seeing it as a potential danger and a rivalry and often as a zero-sum game. What about today?
The sum of squares and degree of freedom calculation from the previous videos are put into a ratio to calculate the F Value, on whose basis the null hypothesis is confirmed or rejected. If variance is higher between samples than within the null hypothesis is more likely to be rejected. The results of a numerical example are interpreted more abstractly and then tested with regards to a confidence interval and the corresponding F table.
As opposed to the conventional over-simplified assumption of self-interested individuals, strong evidence points towards the presence of heterogeneous other-regarding preferences in agents. Incorporating social preferences – specifically, trust and reciprocity - and recognizing the non-constancy of these preferences across individuals can help models better represent the reality.
What’s inflation? Why is it relevant? And is there an agreed theory about its roots and causes, or is it a contentious concept? That’s what this text is all about: We define what inflation actually means before we delve into the theoretical debate with an interdisciplinary and pluralist approach: What gives rise to it, what factors might influence it, and, consequently, what might be done about it?
Trickle Down Economics - an old topic, but still present in our lives. The idea consists of deregulation of the economy and of lower tax for the top in order to increase the "size of the pie" so everybody would have a bigger piece, even with a smaller share.
In the history of the social sciences, few individuals have exerted as much influence as has Jeremy Bentham. His attempt to become “the Newton of morals” has left a marked impression upon the methodology and form of analysis that social sciences like economics and political science have chosen as modus operandi.
Neoclassical economics focuses on the allocation of scarce resources. Economic analysis is mainly concerned with determining the efficient allocation of resources in order to increase welfare.
The core idea of ecological economics is that human economic activity is bound by absolute limits. Interactions between the economy, society and the environment are analysed, while always keeping in mind the goal of a transition towards sustainability.
Michael Kalecki famously remarked “I have found out what economics is; it is the science of confusing stocks with flows”. Stock-Flow Consistent (SFC) models were developed precisely to address this kind of confusion. The basic intuition of SFC models is that the economy is built up as a set of intersecting balance sheets, where transactions between entities are called flows and the value of the assets/liabilities they hold are called stocks. Wages are a flow; bank deposits are a stock, and confusing the two directly is a category error. In this edition of the pluralist showcase I will first describe the logic of SFC models – which is worth exploring in depth – before discussing empirical calibration and applications of the models. Warning that there is a little more maths in this post than usual (i.e. some), but you should be able to skip those parts and still easily get the picture.
This essay deals with the concepts of Sustainable Land Management (SLM) and Land Degradation Neutrality (LDN).
This article, looks at the complex interaction between an urban economy and the vegetation within that urban area. In summary, numerous studies have found a positive link between increased vegetation and social as well as personal health. It makes a case for increasing urban vegetation as a way to benefit local economies.
What influence do changes in tax policy or state decisions on expenditure have on economic growth? For decades, this question has been controversially debated.
The Philosophy of Economics Foundational Text provides a systematic and well-structured overview over the field of philosophy of economics.
What made the false assumption that saving the economy at all cost during a pandemic so popular? This paper discusses different pathways through the COVID-19 pandemic at national and international level, and their consequences on the health of citizens and their economies.
How can we establish new institutions and practices in order to use fare-free public transport as a beacon for sustainable mobility and a low-carbon lifestyle? The author of this essay elaborates on how practice theory and institutional economics can help to answer this question.
This is an overview of (possibly transformative) proposals to address the economic consequences of the corona crisis
This essay suggests to bring together two aspects of economic thought which so far have developed largely separately: degrowth and feminist economics. In this strive, the concept of care work and its role in feminist economics will be introduced and the downsides of the commodification of care work will be discussed. Subsequently, contributions to the discussion on the (re)valuation of care work will be taken into account.
A review of:  Intermediate Microeconomics, H.R. Varian  Mikrooekonomie, R.S. Pindyck, D.L. Rubinfeld  Grundzuege der mikrooekonomischen Theorie, J. Schumann, U. Meyer, W. Stroebele
Due to the economic crisis of 2008/2009, households faced drastic decreases in their incomes, the availability of jobs. Additionally, the structure of the labour market changed, while austerity measures and public spending cuts left households with less support and safeguards provided by the state. How have these developments affected the burden of unpaid labour and what influence did this have on gender relations?
This essay focuses on the sources of government revenue within the Middle East and North African (MENA) region and proposes the implementation of a regional tax reset through increased taxation and tax reforms, deregulation in the private sector and economic diversification to reduce macroeconomic volatilities caused by the hydrocarbon industry.
A historical glimpse of how economists of the 19th century debated the usefulness of mathematics to economics
The last 15 years have seen extensive research into ecosystem service valuation (ESV), spurred by the Millenium Ecosystem Assessment in 2005 (Baveye, Baveye & Gowdy, 2016). Ecosystem services are defined as “the benefits people obtain from ecosystems” (Millenium Ecosystem Assessment, p.V). For example, ecosystems provide the service of sequestering carbon which helps regulate the climate. Valuation means giving ecosystems or their services a monetary price, for example researchers have estimated that the carbon sequestration services of the Mediterranean Sea is between 100 and 1500 million euros per year. The idea of ESV was a response to the overuse of natural resources and degradation of ecosystems, allegedly due to their undervaluation and exclusion from the monetary economy. ESV can be used (1) for policy decision-making, for example allocating funding to a reforestation project (2) for setting payments to people who increase ecosystem services, for example a farmer increasing the organic carbon content of their soil, and (3) for determining fees for people who degrade ecosystem services, for example a company that causes deforestation.
Post-Keynesians focus on the analysis of capitalist economies, perceived as highly productive, but unstable and conflictive systems. Economic activity is determined by effective demand, which is typically insufficient to generate full employment and full utilisation of capacity.
Evolutionary economics focuses on economic change. Hence processes of change such as growth, innovation, structural and technological change, as well as economic development in general are analysed. Evolutionary economics often gives emphasis to populations and (sub-)systems.
Mainstream inflation theories in economics do little to explain the recent acceleration in price increases. The associated economic policy recommendations further increase the misery of low-income groups.
"Despite the rediscovery of the inequality topic by economists as well as other social scientists in recent times, relatively little is known about how economic inequality is mediated to the wider public of ordinary citizens and workers. That is precisely where this book steps in: It draws on a cross-national empirical study to examine how mainstream news media discuss, respond to, and engage with such important and politically sensitive issues and trends.
The Gender strategy of the IMF: The way to go towards gender equality or a mere instrumentalisation of feminism?
Due to the IMF’s focus on gender budgeting, this essay will mainly examine its gender budgeting recommendations as an example of its general inclination towards gender issues and its conception of gender equality. What does the IMF’s focus on gender equality really mean from a critical feminist perspective? What are its main objectives? What does it seek to change and to maintain? What concept or idea of women does it follow and what are the underlying theoretical foundations?