LTTvarios raidos koncepcija yra plačiai išnagrinėta teorine prasme, kuri visuotinai suprantama kaip nemažėjanti visuomenės ekonominė gerovė, atsižvelgiant į technologinius, ekologinius ir socialinius veiklos apribojimus. Tačiau dažniau yra akcentuojama tik silpno tvarumo sąlyga, kad bendra turimo kapitalo vertė turi nemažėti laike. Ne mažiau svarbi griežtesnė tvarios raidos sąlyga, kuri teigia, kad gamtos kapitalo palaikymas pastoviame lygyje garantuotų žmonijos potencialo tenkinti poreikius nemažėjimą ateityje ir tuo pačiu tvarią nenutrūkstamą raidą. Šis reikalavimas vadinamas stipraus tvarumo sąlyga. Straipsnyje nagrinėjami ne tik teoriniai, bet irpraktiniai tvarios raidos vertinimo klausimai. [Iš leidinio]Reikšminiai žodžiai: Kapitalas; Sąlyga; Tvarumas; Visuomenės ekonominė gerovė; Capital; Condition; Economical; Economical welfare of society; Sustainability; Welfare of society.
ENThe paper makes an overview of theoretical and practical issues of sustainable development starting with the weak sustainability clause and moving to formulation of the strong sustainability clause. The weak sustainability clause, that gross value of disposable capital should not decrease is emphasised. The generation equality principal and other criteria of welfare are analysed. The necessity for the strong sustainability clause is analysed, which states that sustainability of ecological capital on a non-declining level would secure no contraction of the need in the future and, concurrently, sustainable uninterrupted development. Problems related with discounting of utility and formulation of the Green Golden Rule provisions are more widely tackled. A practical measure of economic sustainability is presented – real saving, which measures changes in gross capital value, when capital encompasses both tangible, natural and social factors and resources. Calculation of the real saving measure is not complicated: it simply equals changes in tangible assets, natural capital and social capital reserves, multiplied by their shadow prices. However, in practice, when calculating real saving one faces the problem of shortage of relevant information or its unreliability. [From the publication]