There are many best methods but it depends on the variables you are considering. Looking at productivity and growth output as a result of policy, you can use the Cobb-Douglas production function based on the most advanced results of the survey research and on studies developed in others institutions concerning the factors influenced by the policy.

Its depend on types of policy. At first develop a set of indicators. then develop your own model. finally assess impact of the project.....

I think Monitoring is the better method for impact evaluation particularly, seasonal programmes, which are mainly depend upon nature and seasonal variations. This is only my perception.

Policy evaluation applies evaluation principles and methods to examine the content, implementation or impact of a policy. Evaluation is the activity through which we develop an understanding of the merit, worth, and utility of a policy. Impact assessment. From Wikipedia, the free encyclopedia. Policy Impact Assessments (IAs) are formal, evidence-based procedures that assess the economic, social, and environmental effects of public policy. They have been incorporated into policy making in the OECD countries and the European Commission.

Impact evaluation assesses the changes that can be attributed to a particular intervention, such as a project, program or policy, both the intended ones, as well as ideally the unintended ones. Impact Assessment is a means of measuring the effectiveness of organisational activities and judging the significance of changes brought about by those activities. It is neither Art or Science, but both. Impact assessment is intimately linked to Mission, and, in that sense, ripples through the organisation.

Regards

Policy impact evaluation is sometimes complex and requires detailed informations. While they are some best methods, they are all specifics and depend on the policy implementation setting.

Discourse the best methods for evaluating policy impact depend on how can we get the evidence we need to assess the impact of policy in a way that is both transparent and defensible? How can we determine what works, in what circumstances and why, to the benefit of current and future policies? Impact evaluation seeks to determine the longer term results that are generated by policy decisions, often through interventions, projects or programmes. Impacts may be positive or negative, intended or unintended, direct or indirect. The choice of methods and designs for impact evaluation of policies and programmes in industry, innovation and science is not straightforward, and comes with a unique set of challenges. Policies and programmes may depend on contributions from other agencies and other actors, or take many years to emerge. Measuring direct cause and effect can be hard.

The choice of appropriate designs and methods for policy impact evaluation will necessarily involve social, ethical and political considerations. The proposed designs of policy impact evaluations need to be scrutinised from this perspective and their consequences anticipated, with suitable social and political processes and ethical safeguards put in place.

Thanks a lot for answers.

There are many methods to show or analyse relationship between variables. First consider the theory and empirical researches on the topic in question.

Possible policies

BEFORE, DURING & AFTER policy implementation measurements by statistical testing. If you are looking at agriculture, one way to evaluate is to collect data over time and break the data into three periods: before, during, and after policy implementation. Look at effects quantity of production, welfare of farmers, price of output, etc..

Policy impact evaluation is known to be quite tricky, so that researchers need to be cautious. Measurements before, during and after policy implementation may not be sufficient as there are many variables which affect the output other than those altered by the policy. The impact of these variables may exaggerate or diminish the impact of those managed by the policy. Thus, the result of the evaluation could be biased. Accordingly, researchers need to isolate the impact of both variables. Researchers usually make use of an intervention group which is affected by the policy and a control group which is not. The impact of the policy is then measured by comparing the output of each group. The measurement on each group can be taken before, during and after policy implementation.

Please find more information on:

https://www.adb.org/sites/default/files/publication/392376/impact-evaluation-development-interventions-guide.pdf

@Yudhi Dharma Nauly, thank you for your reply.

I love this discussion. I am currently assessing STI policies and their impact on economic development. thank everyone

Yudhi Dharma Nauly

I am looking for the difference between the words assessment and evaluation in the impact policy.