The Double-Peaked Shape of the Laffer Curve in the Case of the Inverted S-Shaped Labor Supply Curve

The classical backward bending of the labor supply curve has been extended to case inverted S-shaped during last three decades. According this extension, at very low net wage levels near subsistence income level, positive shape may also be curved and become negatively sloped. A decrease in rate requires an increase supply, maintain a minimum level for survival. leads double-peaked Laffer curve, which includes possibility tax rates, each enables collection same revenue. This occur contrast traditional single-peaked two rates with revenues.