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In Marxian economics , the rate of accumulation is defined as the value of the real net increase in the stock of capital in an accounting period and the proportion of realised surplus-value or profit-income which is reinvested , rather than consumed .
 Marxian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Marxian