====== Introduction ====== This Wiki is an introduction to the field theory of economies. Field theories use mathematical calculations to describe physical effects that are caused by forces and their interactions. Also, the economy is ultimately a product whose main forces, the totality of production which is the gross domestic product (GDP or Y) and the whole of the equity (capital stock or K), are in a causal relationship. The concept of field theory essentially means that the fundamental principle of „nothing comes from nothing“, is considered on balance equations and their systematic treatment. Field theory is the standard procedure to calculate complex systems in theoretical physics. It can be shown that calculating the economic growth of an economy can be done exactly by correctly balancing the quantity equation of macroeconomics. It gives ultimate analytical insight to the main failure of (neo-)classical macroeconomics, which is not to take into account the whole of all assets in an economy and its retroactivity to GDP. If one balances correctly then the outcome of the real GDP growth, including the arrise of the crisis, can be calculated with high accuracy. So one can show for example that an economy enters into crisis if the whole of all assets, which means all loans to the real economy plus all banks own business including stock markets and what so ever, exceeds three times the GDP. Or/And if the banks own business exceeds the loans to the real economy. Also the CPI can be calculated on theoretical basis and fits the statistical CPI very well. As it is based on analytical instead of statistical calculations, the rules of inflation and deflation can be understood on a fundamental basis. The effect of the new growth model of the economies can not be exaggerated because as it can predict the evolution and interdependence of global economies with practically usable accuracy. In particular, the quantitative effects of political and economic interventions in the financial system will be more reliable forecasted in the future. This may lead eventually to the fact that investment decisions in the financial services as well as the policy, can both be managed and communicated more risk-aware and safer. ===== / ===== The (german) book is an introduction for professionals into the new macroeconomic theory which has evolved since 2009. There is quite a bit of research to do yet. This affects not only the further development of the theory and its practical applications, but it also affects the need for reliable statistical data of the worldwide statistical institutions. Unfortunately it is currently not the case that the economic data that you really need are easily and accurate accessible. Especially as the national institutions are orientated on classical economic theories, which has both eyes fixed on GDP, the so important whole of all assets is often not clearly available. The institutions of the FRG (Federal Republik of Germany) are worldwide still positive with the exception of its scope and detailed collection of high quality data. But this is the case in a surprisingly small number of countries, where often only rudimentary data are recorded or are of doubtful quality. In the book we use the FRG as the sample economy from a second reason: The FRG started in 1948 with the new Deutsche Mark from a real point zero. So it can demonstrates the growth of GDP and capital stock in an approximately pure manner. But as the basis system is an initial value problem, it can be started at any point in time to achive its predictive power. The translation of the book in English, and also as time goes by with some enhancements, is still in progress. Meanwhile the book can be ordered in German language. Also some short extracts of some basics in english language can be read on internet at Real-World Economics Review, [[http://www.paecon.net/PAEReview/issue57/PeetzGenreith57.pdf |The financial sector and the real economy]], issue no. 57. The actual book is also available for example at Amazon in USA or Great Britain and elsewhere in Europe and the World by amazon: just type in the ISBN 9783842380295 to find it at any bookstore.