Alderfer's ERG Theory of Motivation 

Clayton Alderfer propounded ERG Theory. It is an extension of Maslow's Needs Hierarchy Theory. Here is a detailed video which shall help you to learn and understand this motivational theory.
Here are some useful links:-
Maslow's Hierarchy of Needs Theory
• Maslow's Hierarchy of ...
Frederick Herzberg's Motivation Hygiene (two factor) Theory
• Frederick Herzberg's M...
McClelland's Three Needs Theory
• McClelland's Three Nee...
Product Planning in International Markets
• Product Planning in In...
Absolute Cost Advantage Theory
• Absolute Cost Advantag...
Comparative Cost Advantage Theory
• Comparative Cost Advan...
Factor Endowment Theory
• Factor Endowment Theory
Motivating Factors in International Marketing
• International Marketin...
Importance of Global Economic Environment In International Business
• Importance of Global E...
Gross Domestic Product (GDP)
• Gross Domestic Product...