Recently, there have been made many changes in the field of public procurement during last decade. The politicians, scientists and practitioners are showing more interest this allowedly, trying to study it thoroughly participate evaluating role procurement, while studying economic situation state. Public has become a strategic tool for essential goods services, formal set sales purchase measure...

Congestion charging is generally regarded as an effective tool to manage the ongoing growth in road use and abate congestion. However, public support typically very low therefore few schemes have been implemented. The concept of tradable peak credits (TPC), which based on cap-and-trade principle, has characteristics that are believed lead more support. First, a TPC system revenue-neutral since ...