1,549 works, 150 years of economic thought. Each one summarized and searchable, with cited passages inside.
No single psychological impulse, neither abstinence nor Böhm-Bawerk's alleged underestimation of future needs, can carry the weight of interest. Working at the crossroads of Austrian capital theory, marginal productivity, and monetary economics, Mahr rebuilds the theory around the productivity of roundabout production, distinguishing horizontal expansion, which repeats existing methods, from vertical expansion, which lengthens production through new stages. Whether longer methods pay depends on technology, market size, and above all wages. He then abandons the fiction of one capital market and one rate: money markets, bond markets, and stock markets communicate imperfectly, their rates parting over the cycle. Modifying Wicksell, he locates the trigger of booms not in a single natural rate but in a discount rate held below the normal money-market level. The result fuses Böhm-Bawerkian roundaboutness with institutional and monetary realism.
Die Kenntnis der Gesetze des Produktionsertrages ist eine unentbehrliche Voraussetzung der Zinstheorie wie überhaupt jeder Einkommenstheorie.
English translation: “Knowledge of the laws of the yield of production is an indispensable prerequisite of the theory of interest, as indeed of any theory of income.”
Single-cause explanations of mass unemployment are the target here. Unemployment turns chronic, Mahr argues, when shocks to profitability collide with rigid union wages, monopoly pricing, monetary disturbance, and political insecurity, forces that in the Depression's depths coincided all at once. The analytic core is marginal productivity: wages driven above the marginal product of labor raise unit costs, restrict output, and displace workers, an effect that often surfaces only later, when demand falls or fixed capital must be replaced and wages prove unable to fall. Rationalization forced by excessive wages generates no compensating rise in labor demand. From these distinctions follow conditional remedies, credit-financed public works chosen for real social utility, wage cuts matched by price cuts, work-sharing at unchanged hourly rates, while Germany's recovery stays hostage to reparations.
Die Steigerung der Löhne über die Grenzproduktivität hinaus, die Überhöhung der Löhne führt so zur Entstehung von Arbeitslosigkeit.
English translation: “The raising of wages beyond marginal productivity, the excessive level of wages, thus leads to the emergence of unemployment.”
A plot of fifteen hundred to three thousand square meters, enough for vegetables, potatoes, fruit, poultry, rabbits, perhaps a goat, anchors this Depression-era proposal for Vienna. The wager is that industry, even in recovery, will not again employ everyone eight hours a day, so the unemployed need a supplementary livelihood rooted in the soil rather than merely healthier housing. Mahr designs the whole settlement economy: land secured by lease or hereditary building right rather than costly purchase, construction cheapened through voluntary labor service, serial building, and local materials, even an industrial labor service in which future settlers make their own bricks and window frames against credited wage claims. Financed by domestic loans at roughly fifteen hundred Schilling per holding, Stadtrandsiedlung leaves a lasting productive asset where ordinary public works leave none.
Aus diesen Gründen erscheint die Behauptung durchaus gerechtfertigt, daß die Förderung der Stadtrandsiedlung gegenwärtig unter den Zielen der staatlichen Wirtschaftspolitik an erster Stelle stehen sollte.
English translation: “For these reasons, the assertion appears entirely justified that the promotion of suburban settlement should presently stand in first place among the aims of state economic policy.”
Could the money already spent on the dole be reorganized so that the unemployed produce necessities for one another? That is the wager of this 1937 monograph, which treats postwar joblessness as structural rather than cyclical and finds ordinary relief a guarantee of idleness and emergency public works too costly to generalize. Mahr first dismantles rival schemes: Lederer's disguised socialization of idle plant and the substitute-currency plans of Graham and of Eaton, Cheadle, and Ewing, which would leak into the money economy and dump discounted goods on ordinary producers. His own Hilfswerk rests on binding advance orders, payment in restricted vouchers redeemable only within the scheme, and the inclusion of farm surpluses and part-time settlement, so that a disciplined emergency economy sustains the excluded without inflation or market displacement.
Wäre die ganze Produktion auf Vorausbestellungen aufgebaut, gäbe es natürlich auch keine Absatzkrisen, weil eben dann nur die Waren erzeugt würden, welche schon im Vorhinein ihre Abnehmer gefunden haben.
English translation: “If the whole of production were built on advance orders, there would of course be no sales crises either, because then only those goods would be produced which had already found their buyers in advance.”
Scarcity is the premise from which everything else unfolds, economic life understood as the disposition of limited goods toward the fullest possible satisfaction of needs. This comprehensive Viennese treatise, here in its substantially expanded second edition, moves from needs, goods, and marginal utility through a full theory of prices, competition, monopoly, oligopoly, bilateral monopoly, and the imputation of factor values from consumer demand, into money, credit, national income, and the business cycle. Mahr rejects the static claim that investment merely follows prior saving; in a growing economy, he argues, investment must exceed saving, the excess financed by monetary expansion. Against Hayek's neutral money he defends stabilizing a wholesale-price index; on foreign trade he is liberal but strategic, weighing reciprocity and defensive tariffs. Throughout, causal explanation takes priority over moral verdict, though moral judgment is never dismissed.
Keinesfalls erspart die ethische Bewertung eines wirtschaftlichen Vorganges die Mühe seiner kausalen Erklärung.
English translation: “Under no circumstances does the ethical evaluation of an economic process spare us the effort of its causal explanation.”
Affluence has not made people happier: that unsettling premise drives this 1964 study of modern industrial society. Full employment, rising productivity, and mass consumption are genuine achievements, yet Mahr sees them breeding new pathologies, a wage-price spiral as governments bound to full employment accommodate every union demand, consumer egoism and status display in Veblen's sense, monotonous work, empty leisure, falling birth rates, and swelling cities. The social market economy of Müller-Armack and Erhard is defended as the best available order, but framework alone cannot suffice. His remedy is twofold: decentralized industry paired with garden-home settlements that restore meaningful activity outside the factory, and a moral renewal led by a nonpartisan elite schooled in Christian ethics and noble simplicity against the artificially inflated needs of prosperity.
Demzufolge sind die Regierungen einzugreifen gezwungen, wenn in irgendwelchen Bereichen der Volkswirtschaft ein Rückgang der Beschäftigung einsetzt.
English translation: “Governments are consequently compelled to intervene whenever a decline in employment sets in in any sector of the economy.”
No concept in economic theory, Mahr observes, has been defined in more diverse ways than capital—and much theoretical confusion follows from treating heterogeneous objects and markets as one. He holds real capital and money capital to be two aspects of a single phenomenon, and separates capital in the national-economic sense from private wealth that merely yields income: consumer loans, resold securities, and land purchases may enrich an owner without adding to social productive capacity. The fiction of a single market and a single interest rate dissolves into a short-term money market and a long-term investment market that communicate only imperfectly, their rate differences sustained by liquidity, cycle, and institutional constraint. Interest, finally, is neither a reward for saving nor a mere liquidity premium but an investment premium that restrains hoarding and keeps funds flowing to productive capital.
Der Zins ist weder eine Prämie für das Sparen, noch wird er als Illiquiditätsprämie ausreichend charakterisiert. Er ist vielmehr als Investitionsprämie zu bezeichnen.
English translation: “Interest is neither a premium for saving, nor is it adequately characterized as a liquidity premium. Rather, it is to be designated as an investment premium.”
The claim that every line of a consumer's spending is pushed to the same weighted marginal utility—Gossen's second law, and the hinge of the equilibrium systems of Jevons, Walras, and Pareto—is here dismantled as an aprioristic construction unsupported by experience. Following Hans Mayer, Mahr argues that consumption does not adjust in equal infinitesimal steps: as income rises some quantities stay fixed, inferior goods give way to better ones, and new wants awaken, so no common marginal level is ever revealed. Bread and potatoes remain 'overmarginal' for the well-off, their utility above that of money; genuine leveling appears only in the poorest budgets. What survives the critique is narrow—the marginal utility of money—and a warning that elegant equations must not be allowed to remake economic fact. First published in 1949.
Fällt das Gesetz vom Grenznutzenniveau, dann werden auch die n (m—1) Gleichungen — n repräsentiert dabei die Zahl der Individuen und m die Zahl der Waren —, in denen dieses Gesetz zum Ausdruck kommt, hinfällig.
English translation: “If the law of the marginal-utility level falls, then the n(m−1) equations—where n represents the number of individuals and m the number of goods—in which this law is expressed, also become invalid.”
Mahr reopens the Austrian puzzle of productive interest by asking precisely what the 'time element' contributes to it. Accepting from Jevons and Böhm-Bawerk that capitalistic production is temporally extended and present factor payments oriented toward future revenues, he defends—against Schumpeter—the persistence of an interest rate in a static economy: statics inherits the rate that development established and finds no force to remove it. His sharpest correction targets Böhm-Bawerk's 'average period of production,' whose inclusion of a capital good's whole past history breeds infinite regress and makes an old mine lengthen a present process merely by age. Distinguishing production period from use period, Mahr rebuilds the concept as the technically necessary time embodied in the portion actually consumed, and denies that more capital must always lengthen production or lower returns.
Die Einbeziehung der Nutzungsperiode der Kapitalgüter in die Berechnung der durchschnittlichen Produktionsperiode scheint mir die hauptsächliche Quelle aller Widersprüche und Ungereimtheiten darzustellen, die diesem Begriff bisher anhafteten.
English translation: “The inclusion of the period of use of capital goods in the calculation of the average period of production seems to me to constitute the principal source of all the contradictions and inconsistencies that have hitherto attached to this concept.”
There is no such thing as 'the' interest rate, only a plurality of rates differing by term, market, risk, and realizability—and from that dismantling Mahr builds his central claim. Interest, he holds, has no determinate effect on how much people save but a decisive effect on the form savings take, and thus on the supply of funds for productive investment. Offered here in the German version of a 1955 Italian essay, the study separates risk premia from a narrowed notion of liquidity and faults Keynes for grounding interest wholly in the striving for liquidity. Since saving depends chiefly on income, the rate matters most by steering wealth toward productive credit or away into cash hoards, land, and durable Sachsparen; net interest, Mahr concludes, could never sink to zero of its own accord.
Aber es geht viel zu weit, die Zinserklärung zur Gänze auf dem Liquiditätsstreben zu basieren, wie dies Keynes tut.
English translation: “But it goes much too far to base the explanation of interest entirely on the striving for liquidity, as Keynes does.”
Why does a country's current account normally settle back toward balance when money is neither inflated nor deflated? Mahr's answer, from 1957, discards purchasing-power parity—too blind to non-traded goods, tariffs, freight, and capital movements—and grounds external equilibrium in the budgets of individual households and firms, which cannot forever spend without income or receive without spending. From this micro-foundation, refined out of Wieser by shifting the emphasis from claims to actual receipts and expenditures, he traces how a passive balance depresses income and so curbs imports (the income effect), while falling prices and wages, where they are permitted, speed correction (the price effect). Where monopolies and rigid wages block the price effect, adjustment falls instead on output and unemployment; flexible exchange rates, he warns, breed uncertainty and protectionism.
Die Tendenz zum Gleichgewicht in der Zahlungsbilanz ist die Folge einer analogen Tendenz, die innerhalb der Budgets der Einzelwirtschaften wirksam ist.
English translation: “The tendency toward equilibrium in the balance of payments is the consequence of an analogous tendency operating within the budgets of individual economic units.”
Against the post-Keynesian notion of an 'equilibrium income' defined by the equality of saving and investment, Mahr insists that a growing economy has no fixed point of rest, only balanced growth—the harmonious movement of its aggregate magnitudes. Attacking Samuelson's tabular model, he argues that investment merely matched by current saving reproduces income rather than enlarging it; expansion requires investment to outrun saving, the excess financed by monetary and credit expansion. The multiplier is reinterpreted as a temporal process bound to the income velocity of money, and saving is assigned a stabilizing office, absorbing purchasing power while long-gestation projects—power stations, housing, factories—create incomes before goods. First published in 1956, the essay ends where the social market economy begins: value-stable monetary policy, backed when needed by fiscal policy and measures against monopoly power.
Es gehört geradezu zu den Voraussetzungen eines störungsfreien Wachstumsprozesses, daß die Investitionen höher sind als die Ersparungen, wobei das Mehr an Investitionen durch Erweiterung des Zahlungsmittelumlaufs finanziert wird.
English translation: “It belongs, indeed, among the prerequisites of an undisturbed growth process that investments be higher than savings, the excess of investments being financed through an expansion of the circulation of means of payment.”