Journal of Economic Literature 2011‚ 49:2‚ 326–365 http:www.aeaweb.org/articles.php?doi=10.1257/jel.49.2.326 What Determines Productivity? C S * Economists have shown that large and persistent differences in productivity levels across businesses are ubiquitous. This nding has shaped research agendas in a number of elds‚ including (but not limited to) macroeconomics‚ industrial organization‚ labor‚ and trade. This paper surveys and evaluates recent empirical work addressing the question of
Premium Productivity
Gas exchange is the movement of respiratory gases across a membrane. It is the delivery of oxygen to the body‚ and the elimination of carbon dioxide from the body .The reason why gas exchange takes place because oxygen is one of the most essential requirements of life‚ without which organisms on Earth would not survive. Living organisms generate energy from food through the process of respiration. This allows humans and other organisms to perform their daily tasks. Oxygen is used in mitochondria
Premium Oxygen Carbon dioxide Respiratory system
in the artificial cells to the diffusion rate using the phenolphthalein-NaOH agar and the HCl solution. Lab #2 was a model of diffusion and osmosis‚ in which we filled the model cells with different solutions and determined the rate of diffusion. In lab #3‚ the results demonstrated the interactions between selectively permeable membranes‚ water‚ and solutes and how they are important in cellular and organismal functions. In lab #1‚ the results showed the diffusion rate between the certain time period
Premium Osmosis Chemistry Diffusion
Examining Diffusion and Osmosis Introduction: Purpose: 1. To simulate and observe the diffusion of solutes and the osmosis of water through a semipermeable membrane through color change and sugar tests. 2. To speculate osmosis occurring in dialysis bags and potato cores by comparing percentage change in masses. Background information: Molecules are always in random‚ constant movement due to their kinetic energy. This causes the molecules of a cell to move around and bump into each other
Premium Osmosis Cell wall
Experiment 4A: Determination of a Partition Coefficient for Benzoic Acid in Methylene Chloride and Water Experiment 4B: Solvent Extraction I: Acid-Base Extraction Using the System Benzoic Acid‚ Methylene Chloride‚ and Sodium Bicarbonate Solution Objective A: To accustom participants (students) to general procedures that are used to obtain a partition coefficient at the microscale level. We will gain experience in such practices as the transfer of microliter volumes of solutions with a Pasteur filter
Premium Solvent Sodium bicarbonate Solubility
N/C .5cm N/C N/C Molecular Weight Distance Traveled Speed of Diffusion Blue Dye 793g 20.00mm 600mm/hr Red Dye 496g 45.00mm 1350mm/hr Aloe Vera Gel Molecular Weight Distance Traveled Speed of Diffusion Blue Dye 793g 15mm 450mm/hr Red Dye 496g 25mm 750mm/hr 1. The red dye diffused faster in both materials. 2. Yes‚ since the red dye is lighter it diffuses faster. 3. The rate of diffusion does change after time. The longer the dye sits the less it spreads in
Free Diffusion Molecular diffusion Starch
LabMr.P/Pd. 63/17/14 Osmosis and Diffusion Lab Osmosis is a process where molecules pass through a semi permeable membrane from a less concentrated solution into a more concentrated one‚ equalizing the concentrations on each side of the membrane. Diffusion is the spreading of something more widely.During the osmosis and diffusion lab I tested what happens to a fresh egg when osmosis and diffusion across membranes. The eggs were placed in vinegar‚ distilled water‚ and then lastly syrup. The
Premium Osmosis Chemistry Concentration
To prevent gasoline prices from having devastating effects on the economy it has been proposed that all gasoline prices in the United States be fixed at the average price for the last two years. For simplicity it will be assumed that this price is $2.50 per gallon. When equilibrium prices are under $2.50 per gallon the excess payments will be kept in a government fund. When retail prices exceed $2.50 per gallon money from this fund will be distributed to pay the difference. Do you think that this
Premium Supply and demand Pricing Money
over time by acculturation‚ diffusion‚ and innovation; It spreads by religions and language. Culture develops‚ spreads‚ and changes over time. Innovation‚ diffusion‚ and acculturation are the processes of how culture is changing. Innovation is taking existing technology and resources and creating something new to meet a need. For example‚ to solve the need for storage goods‚ some societies invented baskets woven from reeds because reeds were abundant. Diffusion is the spread of ideas‚ inventions
Premium Culture Sociology The Culture
OIL AND GAS ACCOUNTING: CRITICAL EXAMINATION OF THE APPLICATION OF THEORY TO PRACTICE IN NIGERIA 1.0 INTRODUCTION: The natural resources of a nation‚ particularly the minerals‚ often constitute the lion’s share of the nation’s wealth. This is particularly true of the OPEC nations including Nigeria. Prior to the development of accounting standards issued by the Nigerian Accounting Standards Board (NASB)‚ the financial statements published by the oil and gas industry in Nigeria did not disclose adequate
Premium Petroleum