Vaibhav Bajpai

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Instrumental variables estimation can, in principle, avoid biases that ordinary least squares estimation suffers when explanatory variables are correlated with the disturbances. Finding appropriate instruments is a challenge. This paper uses nine recently published empirical papers to illustrate exemplary practices in IV estimation. Nine strategies for(More)
We compare IPv4 and IPv6 connectivity of dual-stacked hosts using a metric that measures Transmission Control Protocol (TCP) connection establishment time to 100 popular dual-stacked websites. We have deployed an implementation of this metric on 20 SamKnows probes connected to dual-stacked networks that are part of 18 different Autonomous Systems (AS).(More)
—A number of Internet measurement platforms have emerged in the last few years. These platforms have deployed thousands of probes at strategic locations within access and backbone networks and behind residential gateways. In this paper we provide a taxonomy of these measurement platforms on the basis of their deployment use-case. We describe these platforms(More)
The Internet Engineering Task Force (IETF) has developed protocols that promote a healthy IPv4 and IPv6 co-existence. The happy eyeballs algorithm for instance, provides recommendations to application developers to help prevent bad user experience in situations where IPv6 connectivity is broken. In this paper, we compare the IPv4 and IPv6 connectivity of a(More)
We reflect upon our experience in using the RIPE Atlas platform for measurement-based research. We show how in addition to credits, control checks using rate limits are in place to ensure that the platform does not get overloaded with measurements. We show how the Autonomous System (AS)-based distribution of RIPE Atlas probes is heavily skewed which limits(More)
The IETF has developed several solutions that promote IPv4 and IPv6 coexistence , but they need to be thoroughly tested on a large scale, before they can actually be considered as viable solutions. In the following study we present an experimental evaluation of the two popular transitioning technologies: NAT64 and Dual-Stack Lite. Our first goal is to(More)
The proposed method is a classification problem to diagnose Type II diabetes mellitus using improved Gradient Descent back propagation algorithm. The objective of this research is to increase the performance of the network in terms of accuracy. The accuracy was increased by using three key concepts: missing data replacement, data preprocessing and(More)
There is rapid growth in the number of IPv6 users and IPv6 compliant services on the Internet. However, few measurement studies exist about the quality of user experience on IPv6 in comparison to IPv4 for dual-stacked hosts. We present results from a measurement trial consisting of 21 active measurement probes deployed across Europe and Japan connected(More)