एक विकास मॉडल जिसमें उत्पादन के प्रत्येक कारक पर ह्रासमान प्रतिफल (diminishing returns) प्राप्त होता है लेकिन पैमाने के प्रतिफल स्थिर (constant returns to scale) होते हैं, और जहाँ बहिर्जात तकनीकी परिवर्तन दीर्घकालिक आर्थिक विकास उत्पन्न करते हैं, उसे किस नाम से जाना जाता है?

Which of the following statements regarding Hicks' neutral technical progress are correct? (i) It leaves the marginal rate of substitution unchanged at a constant capital-labour ratio. (ii) It is a technical change where the ratio of the marginal product of capital to that of labour remains unchanged at a constant capital-labour ratio. (iii) The average and marginal products of both factors increase in the same proportion at a given capital-labour ratio.

Given below are two statements, one labelled as Assertion (A) and the other as Reason (R): Assertion (A): Harrod's model states that an economy may achieve steady-state economic growth, but this growth path is highly unstable ('knife-edge equilibrium'). Reason (R): Harrod assumes a fixed saving propensity and a fixed-coefficient production function of the type Y = min ( Kv , Lu ) . Choose the correct option: