Neoclassical economic theory, also known as neoclassical growth theory, focuses on the role of capital accumulation and technological progress in driving economic growth. It suggests that increasing the stock of physical capital and human capital, as well as adopting new technologies, can lead to sustained economic growth.

The theory of balanced growth, proposed by Ragnar Nurkse, argues that economic development requires the balanced growth of all sectors of the economy. This means that agriculture, industry, and services should all grow at similar rates to avoid bottlenecks and imbalances that can hinder overall economic progress.

Schumpeterian economic theory, developed by Joseph Schumpeter, emphasizes the role of entrepreneurship and innovation in driving economic growth. It suggests that entrepreneurs who introduce new products, processes, or business models can create economic growth and disrupt existing industries.

Rostow's stages of growth theory, proposed by Walt Rostow, suggests that economic development occurs in a linear and predictable sequence of stages. These stages include the traditional society, the preconditions for takeoff, the takeoff, the drive to maturity, and the age of high mass consumption.

Dependency theory, associated with scholars such as Andre Gunder Frank and Samir Amin, argues that developing countries are exploited by developed countries through trade and investment. It suggests that the economic structures and policies of developed countries perpetuate the underdevelopment of developing countries.

The big push theory, proposed by Paul Rosenstein-Rodan, suggests that a sudden and rapid increase in investment can overcome economic stagnation and initiate sustained economic growth. It argues that a large-scale investment program can create multiple industries simultaneously, generating positive externalities and stimulating overall economic activity.

Human capital theory, developed by economists such as Theodore Schultz and Gary Becker, emphasizes the importance of human capital, including education, skills, and knowledge, in driving economic growth. It suggests that investing in human capital can increase productivity, innovation, and economic growth.

The dual sector model, developed by economists such as W. Arthur Lewis, divides the economy into two sectors: traditional and modern. The traditional sector is characterized by low productivity and subsistence farming, while the modern sector is characterized by high productivity and modern technology.

Endogenous growth theory, developed by economists such as Paul Romer and Robert Lucas, argues that economic growth is driven by the accumulation of knowledge and technological change. It suggests that knowledge and technology are not exogenous factors but are generated within the economic system itself.

The new economic geography theory, developed by economists such as Paul Krugman, explains the spatial distribution of economic activity. It suggests that agglomeration economies and transportation costs play a significant role in determining the location of economic activity and the formation of economic clusters.

Institutional economics theory, associated with economists such as Douglass North and Oliver Williamson, emphasizes the role of institutions and governance in driving economic growth. It suggests that well-defined property rights, efficient legal systems, and effective government policies can create a favorable environment for economic development.

Behavioral economics theory, developed by economists such as Daniel Kahneman and Richard Thaler, incorporates psychological factors into economic decision-making. It suggests that individuals' cognitive biases, heuristics, and emotions can influence their economic choices and behavior.

Evolutionary economics theory, associated with economists such as Richard Nelson and Sidney Winter, emphasizes the role of evolutionary processes and adaptation in driving economic growth. It suggests that economic systems evolve over time through a process of variation, selection, and retention of successful strategies.

Complexity economics theory, associated with economists such as Brian Arthur and W. Brian Arthur, explains the emergence of complex economic systems. It suggests that economic systems are complex adaptive systems that exhibit self-organization, emergence, and path dependence.

Ecological economics theory, developed by economists such as Herman Daly and Robert Costanza, emphasizes the need for sustainable development and environmental protection. It suggests that economic activities should be conducted within the limits of the Earth's ecological systems to ensure long-term sustainability.